Render+Asset: Fix derived Renderer2D, fix Skybox uniform

(address sanitizer, undefined behavior sanitizer)

CMakeLists.txt

@@ -11,6 +11,7 @@ endif()
 # Options
 option(BUILD_SHARED_LIBS "Build shared libraries" OFF)
 option(INFERNO_BUILD_EXAMPLES "Build the Inferno example programs" ${INFERNO_STANDALONE})
+option(INFERNO_BUILD_WARNINGS "Build with warnings enabled" ${INFERNO_STANDALONE})
 
 # ------------------------------------------
 
@@ -25,10 +26,15 @@ set(CMAKE_CXX_STANDARD_REQUIRED ON)
 set(CMAKE_CXX_EXTENSIONS OFF)
 
 # Compiler flags used for all build types
-set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Wall -Wextra -Wpedantic")
+set(COMPILE_FLAGS_DEPS -w)
+if(INFERNO_BUILD_WARNINGS)
+	set(COMPILE_FLAGS_PROJECT -Wall -Wextra -Wpedantic)
 	# -Wall      = All warnings about contructions that are easily avoidable
 	# -Wextra    = Extra warning flags not covered by -Wall
 	# -Wpedantic = Warnings for compiler extensions not part of the standard
+else()
+	set(COMPILE_FLAGS_PROJECT ${COMPILE_FLAGS_DEPS})
+endif()
 
 # Set default build type if not specified
 set(DEFAULT_BUILD_TYPE Release)
@@ -42,14 +48,20 @@ endif()
 # Set build type specific compiler flags
 message("--- ${CMAKE_BUILD_TYPE} ---")
 if(${CMAKE_BUILD_TYPE} STREQUAL Debug)
-	set(CMAKE_CXX_FLAGS_DEBUG "${CMAKE_CXX_FLAGS_DEBUG} -Og -g -pg")
-	# -Og = Optimizations that do not interfere with debugging
-	# -g  = Produce debugging information in OS's native format
-	# -pg = Generate profile information for analysis with gprof
+	# Optimizations that do not interfere with debugging
+	string(APPEND CMAKE_CXX_FLAGS_DEBUG " -Og")
+	# Produce debugging information in OS's native format
+	string(APPEND CMAKE_CXX_FLAGS_DEBUG " -g")
+	# Generate profile information for analysis with gprof
 	# $ gprof <PROJECT> gmon.out > profile-data.txt
+	string(APPEND CMAKE_CXX_FLAGS_DEBUG " -pg")
+	# Enable ASan (Address Sanitizer) and UBSan (Undefined Behavior Sanitizer)
+	string(APPEND CMAKE_CXX_FLAGS_DEBUG " -fsanitize=address,undefined")
+	# Do not omit frame pointer, which helps with debugging.
+	string(APPEND CMAKE_CXX_FLAGS_DEBUG " -fno-omit-frame-pointer")
 elseif(${CMAKE_BUILD_TYPE} STREQUAL Release)
-	set(CMAKE_CXX_FLAGS_RELEASE "${CMAKE_CXX_FLAGS_RELEASE} -O3")
-	# -O3 = Optimizations that increase compilation time and performance
+	# Optimizations that increase compilation time and performance
+	string(APPEND CMAKE_CXX_FLAGS_RELEASE " -O3")
 endif()
 
 set(CMAKE_EXPORT_COMPILE_COMMANDS ON)

assets/glsl/batch-2d.frag

@@ -4,14 +4,14 @@ layout(location = 0) out vec4 color;
 
 in vec4 v_color;
 in vec2 v_textureCoordinates;
-in flat float v_textureIndex;
+in flat uint v_textureIndex;
 
 uniform sampler2D u_textures[32];
 
 void main()
 {
 	vec4 textureColor = v_color;
-	switch(int(v_textureIndex)) {
+	switch(v_textureIndex) {
 		case 0:  break; // Texture unit 0 is reserved for no texture
 		case 1:  textureColor *= texture(u_textures[1],  v_textureCoordinates); break;
 		case 2:  textureColor *= texture(u_textures[2],  v_textureCoordinates); break;

assets/glsl/batch-2d.vert

@@ -0,0 +1,19 @@
+#version 450 core
+
+layout(location = 0) in vec3 a_position;
+layout(location = 1) in vec4 a_color;
+layout(location = 2) in vec2 a_textureCoordinates;
+layout(location = 3) in uint a_textureIndex;
+
+out vec4 v_color;
+out vec2 v_textureCoordinates;
+out flat uint v_textureIndex;
+
+void main()
+{
+	v_color = a_color;
+	v_textureCoordinates = a_textureCoordinates;
+	v_textureIndex = a_textureIndex;
+	// Vclip = Model transform * Vlocal
+	gl_Position = vec4(a_position, 1.0f);
+}

assets/glsl/batch-3d.frag

@@ -1,17 +1,21 @@
 #version 450 core
 
-layout(location = 0) out vec4 color;
+layout(location = 0) out vec4 albedoSpec; // RGB diffuse color
+layout(location = 1) out vec4 position;
+layout(location = 2) out vec4 normal;
 
+in vec3 v_position;
 in vec3 v_normal;
+in vec4 v_color;
 in vec2 v_textureCoordinates;
-in flat float v_textureIndex;
+in flat uint v_textureIndex;
 
 uniform sampler2D u_textures[32];
 
 void main()
 {
-	vec4 textureColor = vec4(1.0f);
-	switch(int(v_textureIndex)) {
+	vec4 textureColor = v_color;
+	switch(v_textureIndex) {
 		case 0:  break; // Texture unit 0 is reserved for no texture
 		case 1:  textureColor *= texture(u_textures[1],  v_textureCoordinates); break;
 		case 2:  textureColor *= texture(u_textures[2],  v_textureCoordinates); break;
@@ -45,5 +49,9 @@ void main()
 		case 30: textureColor *= texture(u_textures[30], v_textureCoordinates); break;
 		case 31: textureColor *= texture(u_textures[31], v_textureCoordinates); break;
 	}
-    color = textureColor;
+
+	albedoSpec.rgb = textureColor.rgb;
+	albedoSpec.a = 1.0; // TODO: read specular from model material
+	position = vec4(v_position, 1.0f);
+	normal = vec4(normalize(v_normal), 1.0f);
 }

assets/glsl/batch-3d.vert

@@ -2,18 +2,27 @@
 
 layout(location = 0) in vec3 a_position;
 layout(location = 1) in vec3 a_normal;
-layout(location = 2) in vec2 a_textureCoordinates;
-layout(location = 3) in float a_textureIndex;
+layout(location = 2) in vec4 a_color;
+layout(location = 3) in vec2 a_textureCoordinates;
+layout(location = 4) in uint a_textureIndex;
 
+out vec3 v_position;
 out vec3 v_normal;
+out vec4 v_color;
 out vec2 v_textureCoordinates;
-out flat float v_textureIndex;
+out flat uint v_textureIndex;
 
-uniform mat4 u_projectionView;
+layout(std140, binding = 0) uniform Camera
+{
+	mat4 u_projectionView;
+	vec3 u_position;
+};
 
 void main()
 {
+	v_position = a_position;
 	v_normal = a_normal;
+	v_color = a_color;
 	v_textureCoordinates = a_textureCoordinates;
 	v_textureIndex = a_textureIndex;
 	// Vclip = Camera projection * Camera view * Model transform * Vlocal

assets/glsl/batch-cubemap.frag

@@ -4,14 +4,14 @@ layout(location = 0) out vec4 color;
 
 in vec4 v_color;
 in vec3 v_textureCoordinates;
-in flat float v_textureIndex;
+in flat uint v_textureIndex;
 
 uniform samplerCube u_textures[32];
 
 void main()
 {
 	vec4 textureColor = v_color;
-	switch(int(v_textureIndex)) {
+	switch(v_textureIndex) {
 		case 0:  break; // Texture unit 0 is reserved for no texture
 		case 1:  textureColor *= texture(u_textures[1],  v_textureCoordinates); break;
 		case 2:  textureColor *= texture(u_textures[2],  v_textureCoordinates); break;

assets/glsl/batch-cubemap.vert

@@ -2,11 +2,11 @@
 
 layout(location = 0) in vec3 a_position;
 layout(location = 1) in vec4 a_color;
-layout(location = 2) in float a_textureIndex;
+layout(location = 2) in uint a_textureIndex;
 
 out vec4 v_color;
 out vec3 v_textureCoordinates;
-out flat float v_textureIndex;
+out flat uint v_textureIndex;
 
 uniform mat4 u_projectionView;
 

assets/glsl/batch-font.frag

@@ -4,7 +4,7 @@ layout(location = 0) out vec4 color;
 
 in vec4 v_color;
 in vec2 v_textureCoordinates;
-in flat float v_textureIndex;
+in flat uint v_textureIndex;
 in float v_width;
 in float v_edge;
 in float v_borderWidth;
@@ -25,7 +25,7 @@ float alpha(float textureAlpha)
 void main()
 {
 	vec4 textureColor = v_color;
-	switch(int(v_textureIndex)) {
+	switch(v_textureIndex) {
 		case 0:  break; // Texture unit 0 is reserved for no texture
 		// case 1: textureColor.a = 1; break;
 		case 1:  textureColor.a = alpha(texture(u_textures[1], v_textureCoordinates).a); break;

assets/glsl/batch-font.vert

@@ -3,7 +3,7 @@
 layout(location = 0) in vec3 a_position;
 layout(location = 1) in vec4 a_color;
 layout(location = 2) in vec2 a_textureCoordinates;
-layout(location = 3) in float a_textureIndex;
+layout(location = 3) in uint a_textureIndex;
 layout(location = 4) in float a_width;
 layout(location = 5) in float a_edge;
 layout(location = 6) in float a_borderWidth;
@@ -13,7 +13,7 @@ layout(location = 9) in float a_offset;
 
 out vec4 v_color;
 out vec2 v_textureCoordinates;
-out flat float v_textureIndex;
+out flat uint v_textureIndex;
 out float v_width;
 out float v_edge;
 out float v_borderWidth;

assets/glsl/lightsource.frag

@@ -0,0 +1,17 @@
+#version 450 core
+
+layout(location = 0) out vec4 color;
+
+in vec4 v_color;
+in vec3 v_textureCoordinates;
+in flat uint v_textureIndex;
+
+uniform samplerCube u_textures[32];
+
+void main()
+{
+	// Prevent u_textures variable from getting optimized away
+	if (texture(u_textures[0], vec3(0.0f)).x > 99999.0f) { discard; }
+
+	color = v_color;
+}

assets/glsl/lightsource.vert

@@ -2,19 +2,22 @@
 
 layout(location = 0) in vec3 a_position;
 layout(location = 1) in vec4 a_color;
-layout(location = 2) in vec2 a_textureCoordinates;
-layout(location = 3) in float a_textureIndex;
+layout(location = 2) in uint a_textureIndex;
 
 out vec4 v_color;
-out vec2 v_textureCoordinates;
-out flat float v_textureIndex;
+out vec3 v_textureCoordinates;
+out flat uint v_textureIndex;
 
-uniform mat4 u_projectionView;
+layout(std140, binding = 0) uniform Camera
+{
+	mat4 u_projectionView;
+	vec3 u_position;
+};
 
 void main()
 {
 	v_color = a_color;
-	v_textureCoordinates = a_textureCoordinates;
+	v_textureCoordinates = a_position;
 	v_textureIndex = a_textureIndex;
 	// Vclip = Camera projection * Camera view * Model transform * Vlocal
 	gl_Position = u_projectionView * vec4(a_position, 1.0f);

assets/glsl/post-process.frag

@@ -0,0 +1,78 @@
+#version 450 core
+
+layout(location = 0) out vec4 color;
+
+in vec4 v_color;
+in vec2 v_textureCoordinates;
+in flat uint v_textureIndex;
+
+uniform sampler2D u_textures[32];
+
+// -----------------------------------------
+
+layout(std140, binding = 0) uniform Camera {
+	mat4 u_projectionView;
+	vec3 u_position;
+};
+
+// -----------------------------------------
+
+struct DirectionalLight {
+	vec3 direction;
+
+	vec3 ambient;
+	vec3 diffuse;
+	vec3 specular;
+};
+
+const int MAX_DIRECTIONAL_LIGHTS = 4;
+layout(std430, binding = 0) buffer DirectionalLights {
+	DirectionalLight u_directionalLight[MAX_DIRECTIONAL_LIGHTS];
+};
+
+// -----------------------------------------
+
+void main()
+{
+	float isObject = texture(u_textures[v_textureIndex + 1], v_textureCoordinates).a;
+	if (isObject == 0.0f) {
+		color = vec4(0,0,0,0);
+		return;
+	}
+
+	vec3 albedo    = texture(u_textures[v_textureIndex + 0], v_textureCoordinates).rgb;
+	float specular = texture(u_textures[v_textureIndex + 0], v_textureCoordinates).a;
+	vec3 position  = texture(u_textures[v_textureIndex + 1], v_textureCoordinates).rgb;
+	vec3 normal    = texture(u_textures[v_textureIndex + 2], v_textureCoordinates).rgb;
+
+
+	vec3 lighting = vec3(0.0f, 0.0f, 0.0f);//albedo * v_color.xyz;
+	vec3 viewDirection = normalize(u_position - position);
+
+	// Loop through all directional lights
+	for (int i = 0; i < MAX_DIRECTIONAL_LIGHTS; ++i) {
+		// Diffuse
+		vec3 lightDirection = normalize(-u_directionalLight[i].direction);
+		float diffuse = max(dot(normal, lightDirection), 0.0f);
+
+		// Specular
+		vec3 reflectionDirection = reflect(-lightDirection, normal);
+		float specular = pow(max(dot(viewDirection, reflectionDirection), 0.0f), 32);
+
+		lighting +=
+			(albedo * u_directionalLight[i].ambient) +
+			(albedo * diffuse * u_directionalLight[i].diffuse) +
+			(specular * u_directionalLight[i].specular);
+	}
+
+	// Loop through all point lights
+		// TODO
+		// vec3 lightDirection = normalize(lightPosition - position);
+		// float diffuse = max(dot(normal, lightDirection), 0.0f);
+		// lighting += diffuse * albedo * u_lightColor;
+
+	// Loop through all spot lights
+		// TODO
+
+	color = vec4(lighting, 1.0f);
+}

assets/glsl/post-process.vert

@@ -0,0 +1,25 @@
+#version 450 core
+
+layout(location = 0) in vec3 a_position;
+layout(location = 1) in vec4 a_color;
+layout(location = 2) in vec2 a_textureCoordinates;
+layout(location = 3) in uint a_textureIndex;
+
+out vec4 v_color;
+out vec2 v_textureCoordinates;
+out flat uint v_textureIndex;
+
+layout(std140, binding = 0) uniform Camera
+{
+	mat4 u_projectionView;
+	vec3 u_position;
+};
+
+void main()
+{
+	v_color = a_color;
+	v_textureCoordinates = a_textureCoordinates;
+	v_textureIndex = a_textureIndex;
+	// Vclip = Model transform * Vlocal
+	gl_Position = vec4(a_position, 1.0f);
+}

assets/model/quad.obj

@@ -0,0 +1,15 @@
+# Blender 4.2.0
+# www.blender.org
+usemtl (null)
+o Plane
+v -1.000000 -1.000000 -0.000000
+v 1.000000 -1.000000 -0.000000
+v -1.000000 1.000000 0.000000
+v 1.000000 1.000000 0.000000
+vn -0.0000 -0.0000 1.0000
+vt 0.000000 0.000000
+vt 1.000000 0.000000
+vt 1.000000 1.000000
+vt 0.000000 1.000000
+s 0
+f 1/1/1 2/2/1 4/3/1 3/4/1

assets/scene/scene1.json

@@ -35,8 +35,9 @@
 				"rotate": [ 0.0, 0.0, 0.0 ],
 				"scale": [ 1.0, 1.0, 1.0 ]
 			},
-			"sprite": {
+			"model": {
 				"color": [ 1.0, 1.0, 1.0, 1.0 ],
+				"model": "assets/model/quad.obj",
 				"texture": "assets/gfx/test.png"
 			}
 		},
@@ -44,12 +45,13 @@
 			"id": { "id": 97897897 },
 			"tag": { "tag": "Quad 2" },
 			"transform" : {
-				"translate": [ 1.1, 0.0, 0.0 ],
+				"translate": [ 2.5, 0.0, 0.0 ],
 				"rotate": [ 0.0, 0.0, 0.0 ],
 				"scale": [ 1.0, 1.0, 1.0 ]
 			},
-			"sprite": {
+			"model": {
 				"color": [ 0.5, 0.6, 0.8, 1.0 ],
+				"model": "assets/model/quad.obj",
 				"texture": "assets/gfx/test.png"
 			}
 		},
@@ -57,12 +59,13 @@
 			"id": { "id": 3424242 },
 			"tag": { "tag": "Quad 3" },
 			"transform" : {
-				"translate": [ 2.2, 1.0, 0.0 ],
+				"translate": [ 5.0, 1.0, 0.0 ],
 				"rotate": [ 0.0, 0.0, -20.0 ],
 				"scale": [ 1.0, 1.0, 1.0 ]
 			},
-			"sprite": {
+			"model": {
 				"color": [ 1.0, 1.0, 1.0, 1.0 ],
+				"model": "assets/model/quad.obj",
 				"texture": "assets/gfx/test-inverted.png"
 			},
 			"children": [
@@ -70,12 +73,13 @@
 					"id": { "id": 4345472 },
 					"tag": { "tag": "Quad 4" },
 					"transform" : {
-						"translate": [ 0.85, 0.0, 0.0 ],
+						"translate": [ 1.7, 0.0, 0.0 ],
 						"rotate": [ 0.0, 0.0, 0.0 ],
 						"scale": [ 0.5, 0.5, 1.0 ]
 					},
-					"sprite": {
+					"model": {
 						"color": [ 1.0, 1.0, 1.0, 1.0 ],
+						"model": "assets/model/quad.obj",
 						"texture": "assets/gfx/test-inverted.png"
 					},
 					"children": [
@@ -83,12 +87,13 @@
 							"id": { "id": 5234723 },
 							"tag": { "tag": "Quad 5" },
 							"transform" : {
-								"translate": [ 1.0, 0.0, 0.0 ],
+								"translate": [ 2.0, 0.0, 0.0 ],
 								"rotate": [ 0.0, 0.0, -20.0 ],
 								"scale": [ 0.5, 0.5, 1.0 ]
 							},
-							"sprite": {
+							"model": {
 								"color": [ 1.0, 1.0, 1.0, 1.0 ],
+								"model": "assets/model/quad.obj",
 								"texture": "assets/gfx/test-inverted.png"
 							}
 						}

assets/settings.json

@@ -3,7 +3,7 @@
 		"fullscreen": "windowed",
 		"height": 720,
 		"title": "Inferno",
-		"vsync": true,
+		"vsync": false,
 		"width": 1280
 	}
 }

doc/README.org

@@ -0,0 +1,9 @@
+#+TITLE: Documentation
+#+AUTHOR: Riyyi
+#+LANGUAGE: en
+#+OPTIONS: toc:nil
+
+Topics:
+
+- [[./shaders.org][Shaders]]
+- [[./references.org][References]]

doc/memory-layout.org

@@ -0,0 +1,326 @@
+#+TITLE: Memory Layout
+#+AUTHOR: Riyyi
+#+LANGUAGE: en
+#+OPTIONS: toc:nil
+
+This chapter is about the memory layout of interface blocks in GLSL.
+An interface block is a group of variables, a struct if you will.
+
+There are 4 types of memory layouts that can be used, where the first two aren't
+widely used as those are implementation dependent and require querying the
+OpenGL API for memory offsets.
+
+- packed
+- shared
+- std140
+- std430
+
+** std140
+
+This type is usable in Uniform Buffer Objects (=UBO=) and Shader Storage Buffer
+Objects (=SSBO=).
+
+** std430
+
+This type is only usable in Shader Storage Buffer Objects (=SSBO=).
+
+Main points:
+- Memory is organized into chunks.
+- One chunk has 4 slots, 4 bytes per slot.
+- Can't fit? Move to next chunk.
+- An interface block is at least the size of 1 chunk.
+
+The rules:
+
+- Scalar =bool=, =int=, =uint=, =float=, and =double=
+
+#+BEGIN_SRC
+Both the size and alignment are the size of the scalar in basic machine types
+(e.g., sizeof(GLfloat))
+#+END_SRC
+
+- Two-componment Vectors (e.g., =ivec2=)
+
+#+BEGIN_SRC
+Both the size and alignment are twice the size of the underlying scalar type.
+#+END_SRC
+
+- Three-component Vectors (e.g., =vec3=) and Four-component Vectors (e.g., =vec4=)
+
+#+BEGIN_SRC
+Both the size and alignment are four times the size of the scalar type. However,
+this is only true when the member is part of an array or nested structure
+#+END_SRC
+
+- Array of Scalars and Vectors
+
+#+BEGIN_SRC
+The size of each element in the array will be the same size of the element type,
+where three-component vectors are rounded up to the size four-component
+vectors. This is also the array's alignment. The array's size will be the
+element size times the number of elements.
+#+END_SRC
+
+- Column-major matrix or an array of column-major matrices of size C columns and R rows
+
+#+BEGIN_SRC
+Same layout as an array of N vectors each with R components, where N is the
+total number of columns present.
+#+END_SRC
+
+- Row-major matrix or an array of row-major matrices of size R rows and C columns
+
+#+BEGIN_SRC
+Same layout as an array of N vectors each with C components, where N is the
+total number of rows present.
+#+END_SRC
+
+Both =GLSL= and the =GLM= math library we're using have column-major matrices!
+
+- Single-structure definition or an array of structures
+
+#+BEGIN_SRC
+Structure alignment is the same as the alignment of the biggest structure
+member, where three-component vectors are rounded up to the size of
+four-component vectors. Each structure will start on this alignment, and its
+size will be the space neeeded by its members, according to the previous rules,
+rounded up to a multiple of the structure alignment.
+#+END_SRC
+
+All of the examples described in the following segments are verified by querying
+the OpenGL API.
+
+*** Scalars
+
+These types take up 1 (or 2 with =double=) slot and can appear after anything.
+In the example below you can see that due to the larger alignment, the ~double~
+is forced to the next chunk.
+
+#+BEGIN_SRC glsl
+//        Var    Size    Alignment    Offset
+bool      a; //   4       4            0
+int       b; //   4       4            4
+uint      c; //   4       4            8
+double    d; //   8       8           16
+float     e; //   4       4           24
+#+END_SRC
+
+#+BEGIN_SRC
+Chunks:
+[a][b][c][ ] #1
+[d][d][e][ ] #2
+#+END_SRC
+
+*** Two-component Vectors
+
+**** Float
+
+A Vec2 takes up 2 slots, so will be in the first or last half of a chunk.
+
+#+BEGIN_SRC glsl
+//        Var    Size    Alignment    Offset
+vec2      a; //   8       8            0
+float     b; //   4       4            8
+#+END_SRC
+
+#+BEGIN_SRC
+Chunks:
+[a][a][b][ ] #1
+#+END_SRC
+
+#+BEGIN_SRC glsl
+//        Var    Size    Alignment    Offset
+float     a; //   4       4            0
+vec2      b; //   8       8            8
+#+END_SRC
+
+#+BEGIN_SRC
+Chunks:
+[a][ ][b][b] #1
+#+END_SRC
+
+**** Double
+
+#+BEGIN_SRC glsl
+//        Var    Size    Alignment    Offset
+float     a; //   4       4            0
+dvec2     b; //  16      16           16
+#+END_SRC
+
+#+BEGIN_SRC
+Chunks:
+[a][ ][ ][ ] #1
+[b][b][b][b] #2
+#+END_SRC
+
+*** Three-component and Four-component Vectors
+
+A Vec3 takes up 3 slots, the alignment is 4 slots so only fits at the start of a
+chunk.
+
+#+BEGIN_SRC glsl
+//        Var    Size    Alignment    Offset
+vec3      a; //  12      16            0
+float     b; //   4       4           12
+vec4      c; //  16      16           16
+#+END_SRC
+
+#+BEGIN_SRC
+Chunks:
+[a][a][a][b] #1
+[c][c][c][c] #2
+#+END_SRC
+
+#+BEGIN_SRC glsl
+//        Var    Size    Alignment    Offset
+float     a; //   4       4            0
+vec3      b; //  12      16           16
+vec4      c; //  16      16           32
+#+END_SRC
+
+#+BEGIN_SRC
+Chunks:
+[a][ ][ ][ ] #1
+[b][b][b][ ] #2
+[c][c][c][c] #3
+#+END_SRC
+
+*** Array of Scalars and Vectors
+
+#+BEGIN_SRC glsl
+//        Var    Size    Alignment    Offset
+float[3]  a; //  12       4            0
+float     b; //   4       4           12
+float     c; //   4       4           16
+float[3]  d; //  12       4           20
+#+END_SRC
+
+#+BEGIN_SRC
+Chunks:
+[a][a][a][b] #1
+[c][d][d][d] #1
+#+END_SRC
+
+*Note* the optimizations in the alignment and strides are not applicable to
+~vec3~ elements, these remain unchanged from =std140=.
+
+#+BEGIN_SRC glsl
+//        Var    Size    Alignment    Offset
+float     a; //   4       4            0
+vec3[3]   b; //  48      16           16
+float     c; //   4       4           64
+float     d; //   4       4           68
+vec2[2]   e; //  16       8           72
+float     f; //   4       4           88
+#+END_SRC
+
+#+BEGIN_SRC
+Chunks:
+[a][ ][ ][ ] #1, offset:  0
+[b][b][b][ ] #2, offset: 16
+[b][b][b][ ] #3, offset: 32
+[b][b][b][ ] #4, offset: 48
+[c][d][e][e] #5, offset: 64
+[e][e][f][ ] #6, offset: 80
+#+END_SRC
+
+*Note* the offset needs to be a multiple of the alignment, forcing an entire
+empty chunk in the example below.
+
+#+BEGIN_SRC glsl
+//        Var    Size    Alignment    Offset
+float     a; //   4       4             0
+dvec2[2]  b; //  32      16            16
+dvec3[2]  c; //  64      32            64
+float     d; //   4       4           128
+#+END_SRC
+
+#+BEGIN_SRC
+Chunks:
+[a][ ][ ][ ] #1, offset:   0
+[d][d][d][d] #2, offset:  16
+[d][d][d][d] #3, offset:  32
+[ ][ ][ ][ ] #4, offset:  48
+[c][c][c][c] #5, offset:  64
+[c][c][ ][ ] #6, offset:  80
+[c][c][c][c] #7, offset:  96
+[c][c][ ][ ] #8, offset: 112
+[d][ ][ ][ ] #9, offset: 128
+#+END_SRC
+
+*** Matrices
+
+Alignment is the same as an array of 1 “row” of the matrix.
+No padding between the “rows” of a matrix, but will pad at the end.
+
+#+BEGIN_SRC glsl
+//        Var    Size    Alignment    Offset
+float     a; //   4       4             0
+mat2      b; //  16       8             8
+vec2      c; //   4       4            24
+float     d; //   4       4            32
+mat2[2]   e; //  32       8            40
+float     f; //   4       4            72
+#+END_SRC
+
+#+BEGIN_SRC
+Chunks:
+[a][ ][b][b] #1, offset:   0
+[b][b][c][c] #2, offset:  16
+[d][ ][e][e] #3, offset:  32
+[e][e][e][e] #4, offset:  48
+[e][e][f][ ] #5, offset:  64
+#+END_SRC
+
+TODO: Add more examples
+
+*** Structs
+
+Alignment same as biggest struct member. Size is the size of all members,
+rounded up to a multiple of the alignment.
+
+In the example below you can see that the ~Stuff~ struct, including padding
+between members, is 20 bytes in size. To make that a multiple of the alignment
+additional padding needs to be put at the end, to make the total size 24 bytes.
+
+Each element in the array of structs will apply the alignment again, as seen
+with ~Stuff[1].a~.
+
+#+BEGIN_SRC glsl
+struct Stuff {
+	float a;
+	vec2 b;
+	float c;
+};
+
+//        Var    Size    Alignment    Offset
+Stuff     a; //  20       8
+        a.a; //   4       4            0
+        a.b; //   8       8            8
+        a.c; //   4       4           16
+float     b; //   4       4           24
+Stuff[2]  c; //  44       8
+        c.a; //   4       4           32
+        c.b; //   8       8           40
+        c.c; //   4       4           48
+float     d; //   4       4           80
+#+END_SRC
+
+#+BEGIN_SRC
+Chunks:
+[a][ ][a][a] #1, offset:   0
+[a][ ][b][ ] #2, offset:  16
+[c][ ][c][c] #3, offset:  32
+[c][ ][c][ ] #4, offset:  48
+[c][c][c][ ] #5, offset:  64
+[d][ ][ ][ ] #6, offset:  80
+#+END_SRC
+
+TODO: Add more examples
+
+* References
+
+- https://learnopengl.com/Advanced-OpenGL/Advanced-GLSL
+- https://www.khronos.org/opengl/wiki/Interface_Block_(GLSL)#Memory_layout
+- [[https://www.oreilly.com/library/view/opengl-programming-guide/9780132748445/app09lev1sec2.html][The std140 Layout Rules]]
+- [[https://www.youtube.com/watch?v=JPvbRko9lBg][(YouTube) WebGL 2: Uniform Buffer Objects]]

doc/references.org

@@ -0,0 +1 @@
+

doc/shaders.org

@@ -0,0 +1,8 @@
+#+TITLE: Shaders
+#+AUTHOR: Riyyi
+#+LANGUAGE: en
+#+OPTIONS: toc:nil
+
+Topics:
+
+- [[./memory-layout.org][Memory Layout]]

example/CMakeLists.txt

@@ -15,6 +15,7 @@ add_executable(${GAME} ${GAME_SOURCES})
 target_include_directories(${GAME} PRIVATE
 	"src")
 target_link_libraries(${GAME} ${ENGINE})
+target_compile_options(${GAME} PRIVATE ${COMPILE_FLAGS_PROJECT})
 
 target_precompile_headers(${GAME} REUSE_FROM ${ENGINE})
 

src/CMakeLists.txt

@@ -10,6 +10,7 @@ target_include_directories(${ENGINE} PUBLIC
 	"../vendor/sol2/include"
 	"../vendor/stb")
 target_link_libraries(${ENGINE} ${ENGINE}-dependencies)
+target_compile_options(${ENGINE} PRIVATE ${COMPILE_FLAGS_PROJECT})
 
 # ------------------------------------------
 

src/inferno/application.cpp

@@ -6,22 +6,25 @@
 
 #include <utility> // std::pair
 
+#include "glm/ext/vector_float3.hpp"
 #include "glm/gtc/type_ptr.hpp" // glm::make_mat4
 #include "ruc/format/log.h"
 #include "ruc/meta/assert.h"
 
 #include "inferno/application.h"
+#include "inferno/component/transformcomponent.h"
 #include "inferno/core.h"
 #include "inferno/event/applicationevent.h"
 #include "inferno/event/event.h"
 #include "inferno/event/keyevent.h"
 #include "inferno/event/mouseevent.h"
-// #include "inferno/io/gltffile.h"
-#include "inferno/asset/font.h"
 #include "inferno/io/input.h"
 #include "inferno/keycodes.h"
 #include "inferno/render/buffer.h"
 #include "inferno/render/context.h"
+#include "inferno/render/framebuffer.h"
+#include "inferno/render/uniformbuffer.h"
+#include "inferno/system/rendersystem.h"
 // #include "inferno/render/gltf.h"
 #include "inferno/asset/shader.h"
 #include "inferno/asset/texture.h"
@@ -51,12 +54,11 @@ Application::Application()
 
 	Input::initialize();
 	RenderCommand::initialize();
+	RenderSystem::the().initialize(m_window->getWidth(), m_window->getHeight());
 
 	m_scene = std::make_shared<Scene>();
 	m_scene->initialize();
 
-	// Load assets
-
 	// m_font = FontManager::the().load("assets/fnt/dejavu-sans");
 
 	// auto bla = GlTFFile::read("assets/gltf/box.glb");
@@ -77,11 +79,14 @@ Application::Application()
 Application::~Application()
 {
 	m_scene->destroy();
+	Uniformbuffer::destroy();
 
 	RendererFont::destroy();
 	Renderer2D::destroy();
 	Renderer3D::destroy();
 	RendererCubemap::destroy();
+	RendererPostProcess::destroy();
+	RendererLightCube::destroy();
 	RenderCommand::destroy();
 	AssetManager::destroy();
 	// Input::destroy();
@@ -145,13 +150,20 @@ int Application::run()
 	// offset
 #endif
 
+	double gametime = 0;
+	uint64_t frames = 0;
+
 	while (!m_window->shouldClose()) {
 
 		float time = Time::time();
 		float deltaTime = time - m_lastFrameTime;
 		m_lastFrameTime = time;
-		// ruc::debug("Frametime " << deltaTime * 1000 << "ms");
+		// ruc::debug("Frametime {}ms", deltaTime * 1000);
 
+		gametime += deltaTime;
+		frames++;
+
+		// ---------------------------------
 		// Update
 
 		update();
@@ -160,32 +172,18 @@ int Application::run()
 		m_window->update();
 		m_scene->update(deltaTime);
 
+		// ---------------------------------
 		// Render
 
-		render();
-
-		RenderCommand::clearColor({ 0.2f, 0.3f, 0.3f, 1.0f });
-		RenderCommand::clear();
-
-		std::pair<glm::mat4, glm::mat4> projectionView = m_scene->cameraProjectionView();
-		RendererCubemap::the().beginScene(projectionView.first, projectionView.second); // camera, lights, environment
-		Renderer3D::the().beginScene(projectionView.first, projectionView.second);      // camera, lights, environment
-		Renderer2D::the().beginScene(projectionView.first, projectionView.second);      // camera, lights, environment
-		RendererFont::the().beginScene(projectionView.first, projectionView.second);    // camera, lights, environment
-
 		m_scene->render();
-		// RendererCharacter::the().drawCharacter(character, f->texture());
-
-		RendererCubemap::the().endScene();
-		Renderer3D::the().endScene();
-		Renderer2D::the().endScene();
-		RendererFont::the().endScene();
 
 		m_window->render();
 	}
 
 	ruc::debug("Application shutdown");
 
+	ruc::debug("Average frametime: {:.2f}ms", (gametime / frames) * 1000);
+
 	return m_status;
 }
 
@@ -214,7 +212,7 @@ bool Application::onWindowResize(WindowResizeEvent& e)
 {
 	ruc::info("WindowResizeEvent {}x{}", e.getWidth(), e.getHeight());
 
-	RenderCommand::setViewport(0, 0, e.getWidth(), e.getHeight());
+	RenderSystem::the().resize(e.getWidth(), e.getHeight());
 
 	return true;
 }
@@ -228,6 +226,11 @@ bool Application::onKeyPress(KeyPressEvent& e)
 		m_window->setShouldClose(true);
 	}
 
+	if (e.getKey() == keyCode("GLFW_KEY_F12")) {
+		ruc::info("Taking screenshot..");
+		Texture::saveScreenshotPNG("screenshot.png", m_window->getWidth(), m_window->getHeight());
+	}
+
 	return true;
 }
 

src/inferno/application.h

@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 2022 Riyyi
+ * Copyright (C) 2022,2024 Riyyi
  *
  * SPDX-License-Identifier: MIT
  */
@@ -8,18 +8,18 @@
 
 #include <memory> // std::unique_ptr, std::shared_ptr
 
-#include "ruc/singleton.h"
-
 namespace Inferno {
 
 class Event;
 class Font;
+class Framebuffer;
 class KeyPressEvent;
 class MousePositionEvent;
 class Scene;
 class Window;
 class WindowCloseEvent;
 class WindowResizeEvent;
+struct TransformComponent;
 
 class Application {
 public:

src/inferno/asset/asset-manager.cpp

@@ -38,18 +38,22 @@ bool AssetManager::exists(std::string_view path)
 	return m_assetList.find(path.data()) != m_assetList.end();
 }
 
-void AssetManager::remove(std::string_view path)
+std::nullptr_t AssetManager::remove(std::string_view path)
 {
 	if (exists(path)) {
 		m_assetList.erase(path.data());
 	}
+
+	return nullptr;
 }
 
-void AssetManager::remove(std::shared_ptr<Asset> asset)
+std::nullptr_t AssetManager::remove(std::shared_ptr<Asset> asset)
 {
 	if (exists(asset->path())) {
 		m_assetList.erase(asset->path());
 	}
+
+	return nullptr;
 }
 
 } // namespace Inferno

src/inferno/asset/asset-manager.h

@@ -6,10 +6,12 @@
 
 #pragma once
 
+#include <cstddef> // std::nullptr_t
 #include <memory>  // std::shared_ptr
 #include <string>
 #include <string_view>
 #include <unordered_map>
+#include <utility> // std::forward
 
 #include "ruc/meta/assert.h"
 #include "ruc/meta/types.h"
@@ -36,6 +38,7 @@ public:
 	virtual bool isTexture() const { return false; }
 	virtual bool isTexture2D() const { return false; }
 	virtual bool isTextureCubemap() const { return false; }
+	virtual bool isTextureFramebuffer() const { return false; }
 
 protected:
 	Asset(std::string_view path)
@@ -61,8 +64,8 @@ public:
 
 	void add(std::string_view path, std::shared_ptr<Asset> asset);
 	bool exists(std::string_view path);
-	void remove(std::string_view path);
-	void remove(std::shared_ptr<Asset> asset);
+	std::nullptr_t remove(std::string_view path);
+	std::nullptr_t remove(std::shared_ptr<Asset> asset);
 
 	template<IsAsset T>
 	std::shared_ptr<T> get(std::string_view path)
@@ -76,14 +79,14 @@ public:
 		return std::static_pointer_cast<T>(asset);
 	}
 
-	template<IsAsset T>
-	std::shared_ptr<T> load(std::string_view path)
+	template<IsAsset T, typename... Args>
+	std::shared_ptr<T> load(std::string_view path, Args&&... args)
 	{
 		if (exists(path)) {
 			return get<T>(path);
 		}
 
-		auto asset = T::create(path);
+		auto asset = T::create(path, std::forward<Args>(args)...);
 		add(path, asset);
 		return asset;
 	}

src/inferno/asset/model.cpp

@@ -8,10 +8,10 @@
 #include <memory>  // std::shared_ptr
 
 #include "assimp/Importer.hpp"
+#include "assimp/mesh.h"
 #include "assimp/postprocess.h"
 #include "assimp/scene.h"
 #include "assimp/texture.h"
-#include "ruc/format/log.h"
 
 #include "inferno/asset/model.h"
 #include "inferno/asset/texture.h"
@@ -23,6 +23,7 @@ std::shared_ptr<Model> Model::create(std::string_view path)
 	auto result = std::shared_ptr<Model>(new Model(path));
 
 	Assimp::Importer importer; // importer destructor uses RAII cleanup
+	importer.SetPropertyInteger(AI_CONFIG_PP_SBP_REMOVE, aiPrimitiveType_POINT | aiPrimitiveType_LINE);
 	const aiScene* scene = importer.ReadFile(
 		path.data(),
 		aiProcess_CalcTangentSpace | aiProcess_Triangulate | aiProcess_JoinIdenticalVertices | aiProcess_SortByPType);
@@ -39,7 +40,7 @@ std::shared_ptr<Model> Model::create(std::string_view path)
 void Model::processScene(std::shared_ptr<Model> model, const aiScene* scene)
 {
 	VERIFY(scene->HasMeshes(), "malformed model");
-	VERIFY(scene->mNumTextures < 2, "unsupported model type");
+	VERIFY(scene->mNumTextures < 2, "unsupported model type: {}/1", scene->mNumTextures);
 
 	if (scene->mNumTextures == 1) {
 		aiTexture* texture = scene->mTextures[0];
@@ -51,7 +52,7 @@ void Model::processNode(std::shared_ptr<Model> model, aiNode* node, const aiScen
 {
 	for (uint32_t i = 0; i < node->mNumMeshes; ++i) {
 		aiMesh* mesh = scene->mMeshes[node->mMeshes[i]];
-		processMesh(model, mesh, scene);
+		processMesh(model, mesh, scene, node->mTransformation);
 	}
 
 	for (uint32_t i = 0; i < node->mNumChildren; ++i) {
@@ -59,52 +60,51 @@ void Model::processNode(std::shared_ptr<Model> model, aiNode* node, const aiScen
 	}
 }
 
-void Model::processMesh(std::shared_ptr<Model> model, aiMesh* mesh, const aiScene* scene)
+void Model::processMesh(std::shared_ptr<Model> model, aiMesh* mesh, const aiScene* scene, aiMatrix4x4 parentTransform)
 {
 	VERIFY(mesh->HasPositions(), "malformed model");
 	VERIFY(mesh->HasNormals(), "malformed model");
 
 	// Pre-allocate memory
-	model->m_vertices = std::vector<Vertex>(mesh->mNumVertices);
+	size_t startIndex = model->m_vertices.size();
+	model->m_vertices.resize(startIndex + mesh->mNumVertices);
 
 	for (uint32_t i = 0; i < mesh->mNumVertices; ++i) {
-		aiVector3D v = mesh->mVertices[i];
-		model->m_vertices[i].position = { v.x, v.y, v.z };
+		aiVector3D v = parentTransform * mesh->mVertices[i];
+		model->m_vertices[startIndex + i].position = { v.x, v.y, v.z };
 	}
 
 	// Size of vertices == size of normals
 	for (uint32_t i = 0; i < mesh->mNumVertices; ++i) {
-		aiVector3D normal = mesh->mNormals[i];
-		model->m_vertices[i].normal = { normal.x, normal.y, normal.x };
+		aiVector3D normal = mesh->mNormals[startIndex + i];
+		model->m_vertices[startIndex + i].normal = { normal.x, normal.y, normal.z };
 	}
 
 	if (mesh->HasTextureCoords(0)) {
 		// Size of vertices == size of texture coordinates
 		for (uint32_t i = 0; i < mesh->mNumVertices; ++i) {
 			aiVector3D tc = mesh->mTextureCoords[0][i];
-			model->m_vertices[i].textureCoordinates = { tc.x, tc.y };
+			model->m_vertices[startIndex + i].textureCoordinates = { tc.x, tc.y };
 		}
 	}
 	// TODO: position in the texture atlas
 
 	if (mesh->HasFaces()) {
+		// Pre-allocate memory
+		size_t startIndex2 = model->m_elements.size();
+		model->m_elements.resize(startIndex2 + (mesh->mNumFaces * 3)); // assuming triangles
+
+		size_t offset = 0;
 		for (uint32_t i = 0; i < mesh->mNumFaces; ++i) {
 			aiFace face = mesh->mFaces[i];
-			for (uint32_t j = 0; j < face.mNumIndices; ++j) {
-				model->m_elements.push_back(face.mIndices[j]);
+			VERIFY(face.mNumIndices == 3, "unsupported face type: {}", face.mNumIndices);
+			for (uint32_t j = 0; j < face.mNumIndices; ++j, ++offset) {
+				// Indices are referenced relative to vertices[0], if there are multiple meshes,
+				// then the indices need to be offset by the total amount of vertices
+				model->m_elements[startIndex2 + (i * 3) + j] = startIndex + face.mIndices[j];
 			}
 		}
 	}
-
-	ruc::debug("mesh: {:p}", mesh->mTextureCoordsNames);
-	// for (size_t i = 0; i < AI_MAX_NUMBER_OF_TEXTURECOORDS; ++i) {
-	// 	ruc::debug("mesh: {}", mesh->mTextureCoordsNames[i]);
-	// }
-
-	ruc::debug("has texture: {}", scene->HasTextures());
-
-	ruc::error("asset::model vert {}", model->m_vertices.size());
-	ruc::error("asset::model elem {}", model->m_elements.size());
 }
 
 } // namespace Inferno

src/inferno/asset/model.h

@@ -39,7 +39,7 @@ private:
 
 	static void processScene(std::shared_ptr<Model> model, const aiScene* scene);
 	static void processNode(std::shared_ptr<Model> model, aiNode* node, const aiScene* scene);
-	static void processMesh(std::shared_ptr<Model> model, aiMesh* mesh, const aiScene* scene);
+	static void processMesh(std::shared_ptr<Model> model, aiMesh* mesh, const aiScene* scene, aiMatrix4x4 parentTransform = aiMatrix4x4());
 
 	virtual bool isModel() const override { return true; }
 
@@ -50,4 +50,11 @@ private:
 	std::shared_ptr<Texture2D> m_texture;
 };
 
+// clang-format off
+template<>
+inline bool Asset::fastIs<Model>() const { return isModel(); }
+// clang-format on
+
 } // namespace Inferno
+
+// TODO: figure out this weird thing: https://github.com/assimp/assimp/blob/master/BUILDBINARIES_EXAMPLE.bat#L6-L10

src/inferno/asset/shader.cpp

@@ -50,65 +50,74 @@ Shader::~Shader()
 	}
 }
 
-int32_t Shader::findUniform(std::string_view name) const
+// -----------------------------------------
+
+uint32_t Shader::findUniformLocation(std::string_view name)
 {
+	// Cache uniform locations, prevent going to the GPU every call
+	if (m_uniformLocations.find(name) != m_uniformLocations.end()) {
+		return m_uniformLocations[name];
+	}
+
 	int32_t location = glGetUniformLocation(m_id, name.data());
 	VERIFY(location != -1, "Shader could not find uniform '{}'", name);
+	m_uniformLocations[name] = static_cast<uint32_t>(location);
+
 	return location;
 }
 
 void Shader::setInt(std::string_view name, int value)
 {
 	// Set uniform int
-	glUniform1i(findUniform(name), value);
+	glUniform1i(findUniformLocation(name), value);
 }
 
 void Shader::setInt(std::string_view name, int* values, uint32_t count)
 {
 	// Set uniform int array
-	glUniform1iv(findUniform(name), count, values);
+	glUniform1iv(findUniformLocation(name), count, values);
 }
 
-void Shader::setFloat(std::string_view name, float value) const
+void Shader::setFloat(std::string_view name, float value)
 {
 	// Set uniform float
-	glUniform1f(findUniform(name), value);
+	glUniform1f(findUniformLocation(name), value);
 }
 
-void Shader::setFloat(std::string_view name, float v1, float v2, float v3, float v4) const
+void Shader::setFloat(std::string_view name, float v1, float v2, float v3, float v4)
 {
 	// Set uniform vec4 data
-	glUniform4f(findUniform(name), v1, v2, v3, v4);
+	glUniform4f(findUniformLocation(name), v1, v2, v3, v4);
 }
 
-void Shader::setFloat(std::string_view name, glm::vec2 value) const
+void Shader::setFloat(std::string_view name, glm::vec2 value)
 {
 	// Set uniform vec2 data
-	glUniform2f(findUniform(name), value.x, value.y);
+	glUniform2f(findUniformLocation(name), value.x, value.y);
 }
 
-void Shader::setFloat(std::string_view name, glm::vec3 value) const
+void Shader::setFloat(std::string_view name, glm::vec3 value)
 {
 	// Set uniform vec3 data
-	glUniform3f(findUniform(name), value.x, value.y, value.z);
+	glUniform3f(findUniformLocation(name), value.x, value.y, value.z);
 }
 
-void Shader::setFloat(std::string_view name, glm::vec4 value) const
+void Shader::setFloat(std::string_view name, glm::vec4 value)
 {
 	// Set uniform vec4 data
-	glUniform4f(findUniform(name), value.x, value.y, value.z, value.w);
+	glUniform4f(findUniformLocation(name), value.x, value.y, value.z, value.w);
 }
 
-void Shader::setFloat(std::string_view name, glm::mat3 matrix) const
+void Shader::setFloat(std::string_view name, glm::mat3 matrix)
 {
 	// Set uniform mat3 data
-	glUniformMatrix3fv(findUniform(name), 1, GL_FALSE, glm::value_ptr(matrix));
+	glUniformMatrix3fv(findUniformLocation(name), 1, GL_FALSE, glm::value_ptr(matrix));
 }
 
-void Shader::setFloat(std::string_view name, glm::mat4 matrix) const
+void Shader::setFloat(std::string_view name, glm::mat4 matrix)
 {
 	// Set uniform mat4 data
-	glUniformMatrix4fv(findUniform(name), 1, GL_FALSE, glm::value_ptr(matrix));
+	glUniformMatrix4fv(findUniformLocation(name), 1, GL_FALSE, glm::value_ptr(matrix));
 }
 
 void Shader::bind() const
@@ -121,6 +130,8 @@ void Shader::unbind() const
 	glUseProgram(0);
 }
 
+// -----------------------------------------
+
 uint32_t Shader::compileShader(int32_t type, const char* source) const
 {
 	// Create new shader

src/inferno/asset/shader.h

@@ -4,8 +4,11 @@
  * SPDX-License-Identifier: MIT
  */
 
+#pragma once
+
 #include <cstdint> // int32_t, uint32_t
 #include <string_view>
+#include <unordered_map>
 
 #include "glm/fwd.hpp" // glm::mat3, glm::mat4, glm::vec2, glm::vec3
 
@@ -20,17 +23,17 @@ public:
 	// Factory function
 	static std::shared_ptr<Shader> create(std::string_view path);
 
-	int32_t findUniform(std::string_view name) const;
+	uint32_t findUniformLocation(std::string_view name);
 
 	void setInt(std::string_view name, int value);
 	void setInt(std::string_view name, int* values, uint32_t count);
-	void setFloat(std::string_view name, float value) const;
-	void setFloat(std::string_view name, float v1, float v2, float v3, float v4) const;
-	void setFloat(std::string_view name, glm::vec2 value) const;
-	void setFloat(std::string_view name, glm::vec3 value) const;
-	void setFloat(std::string_view name, glm::vec4 value) const;
-	void setFloat(std::string_view name, glm::mat3 matrix) const;
-	void setFloat(std::string_view name, glm::mat4 matrix) const;
+	void setFloat(std::string_view name, float value);
+	void setFloat(std::string_view name, float v1, float v2, float v3, float v4);
+	void setFloat(std::string_view name, glm::vec2 value);
+	void setFloat(std::string_view name, glm::vec3 value);
+	void setFloat(std::string_view name, glm::vec4 value);
+	void setFloat(std::string_view name, glm::mat3 matrix);
+	void setFloat(std::string_view name, glm::mat4 matrix);
 
 	void bind() const;
 	void unbind() const;
@@ -52,6 +55,7 @@ private:
 
 private:
 	uint32_t m_id { 0 };
+	std::unordered_map<std::string_view, uint32_t> m_uniformLocations;
 };
 
 // -----------------------------------------

src/inferno/asset/texture.cpp

@@ -13,6 +13,8 @@
 #include "ruc/meta/assert.h"
 #define STB_IMAGE_IMPLEMENTATION
 #include "stb/stb_image.h"
+#define STB_IMAGE_WRITE_IMPLEMENTATION
+#include "stb/stb_image_write.h"
 
 #include "inferno/asset/texture.h"
 
@@ -23,13 +25,66 @@ Texture::~Texture()
 	glDeleteTextures(1, &m_id);
 }
 
+// -----------------------------------------
+
+void Texture::savePNG(std::string_view path, std::shared_ptr<Texture> texture)
+{
+	texture->bind();
+
+	// Allocate memory
+	uint32_t dataFormat = texture->m_dataFormat == GL_RGBA ? 4 : 3;
+	size_t dataSize = texture->m_width * texture->m_height * dataFormat;
+	std::vector<unsigned char> data(dataSize);
+
+	// Read texture data from the GPU
+	glGetTexImage(GL_TEXTURE_2D, 0, texture->m_dataFormat, texture->m_dataType, data.data());
+
+	// Write image to a file
+	stbi_flip_vertically_on_write(1);
+	stbi_write_png(
+		path.data(),
+		texture->m_width,
+		texture->m_height,
+		dataFormat,
+		data.data(),
+		texture->m_width * dataFormat);
+
+	texture->unbind();
+}
+
+void Texture::saveScreenshotPNG(std::string_view path, uint32_t width, uint32_t height)
+{
+	// Allocate memory
+	size_t dataSize = width * height * 4;
+	std::vector<unsigned char> data(dataSize);
+
+	// Set the pack alignment to 1 (to avoid row alignment issues)
+	glPixelStorei(GL_PACK_ALIGNMENT, 1);
+
+	// Read the pixels from the default framebuffer
+	glReadPixels(0, 0, width, height, GL_RGBA, GL_UNSIGNED_BYTE, data.data());
+
+	stbi_flip_vertically_on_write(1);
+	stbi_write_png(path.data(), width, height, 4, data.data(), width * 4);
+}
+
+// -----------------------------------------
+
 void Texture::init(uint32_t width, uint32_t height, uint8_t channels)
+{
+	init(width, height,
+	     (channels == 3) ? GL_RGB8 : GL_RGBA8,
+	     (channels == 3) ? GL_RGB : GL_RGBA,
+	     GL_UNSIGNED_BYTE);
+}
+
+void Texture::init(uint32_t width, uint32_t height, uint32_t internalFormat, uint32_t dataFormat, uint32_t dataType)
 {
 	m_width = width;
 	m_height = height;
-
-	m_internalFormat = (channels == 3) ? GL_RGB8 : GL_RGBA8;
-	m_dataFormat = (channels == 3) ? GL_RGB : GL_RGBA;
+	m_internalFormat = internalFormat;
+	m_dataFormat = dataFormat;
+	m_dataType = dataType;
 }
 
 // -----------------------------------------
@@ -49,7 +104,7 @@ std::shared_ptr<Texture2D> Texture2D::create(std::string_view path)
 	VERIFY(data, "failed to load image: '{}'", path);
 
 	result->init(width, height, channels);
-	result->create(data);
+	result->createImpl(data);
 
 	// Clean resources
 	stbi_image_free(data);
@@ -78,7 +133,7 @@ std::shared_ptr<Texture2D> Texture2D::create(aiTexture* texture)
 	}
 
 	result->init(width, height, channels);
-	result->create(data);
+	result->createImpl(data);
 
 	return result;
 }
@@ -99,7 +154,7 @@ void Texture2D::unbind() const
 	glBindTexture(GL_TEXTURE_2D, 0);
 }
 
-void Texture2D::create(unsigned char* data)
+void Texture2D::createImpl(unsigned char* data)
 {
 	m_id = UINT_MAX;
 
@@ -121,7 +176,7 @@ void Texture2D::create(unsigned char* data)
 		m_width, m_height, // Image width/height
 		0,                 // Always 0 (legacy)
 		m_dataFormat,      // Texture source format
-		GL_UNSIGNED_BYTE,  // Texture source datatype
+		m_dataType,        // Texture source datatype
 		data);             // Image data
 
 	// Set the texture wrapping / filtering options
@@ -143,7 +198,7 @@ std::shared_ptr<TextureCubemap> TextureCubemap::create(std::string_view path)
 {
 	auto result = std::shared_ptr<TextureCubemap>(new TextureCubemap(path));
 
-	result->create();
+	result->createImpl();
 
 	return result;
 }
@@ -164,7 +219,7 @@ void TextureCubemap::unbind() const
 	glBindTexture(GL_TEXTURE_CUBE_MAP, 0);
 }
 
-void TextureCubemap::create()
+void TextureCubemap::createImpl()
 {
 	m_id = UINT_MAX;
 
@@ -206,7 +261,7 @@ void TextureCubemap::create()
 			m_width, m_height,                  // Image width/height
 			0,                                  // Always 0 (legacy)
 			m_dataFormat,                       // Texture source format
-			GL_UNSIGNED_BYTE,                   // Texture source datatype
+			m_dataType,                         // Texture source datatype
 			data);                              // Image data
 
 		// Clean resources
@@ -224,4 +279,62 @@ void TextureCubemap::create()
 	glBindTexture(GL_TEXTURE_CUBE_MAP, 0);
 }
 
+// -----------------------------------------
+
+std::shared_ptr<TextureFramebuffer> TextureFramebuffer::create(
+	std::string_view path,
+	uint32_t width, uint32_t height, uint32_t internalFormat, uint32_t dataFormat, uint32_t dataType)
+{
+	auto result = std::shared_ptr<TextureFramebuffer>(new TextureFramebuffer(path));
+
+	result->init(width, height, internalFormat, dataFormat, dataType);
+	result->createImpl();
+
+	return result;
+}
+
+void TextureFramebuffer::bind(uint32_t unit) const
+{
+	// Set active unit
+	glActiveTexture(GL_TEXTURE0 + unit);
+
+	glBindTexture(GL_TEXTURE_2D, m_id);
+
+	// Reset unit
+	glActiveTexture(GL_TEXTURE0);
+}
+
+void TextureFramebuffer::unbind() const
+{
+	glBindTexture(GL_TEXTURE_2D, 0);
+}
+
+void TextureFramebuffer::createImpl()
+{
+	m_id = UINT_MAX;
+
+	// Create texture object
+	glGenTextures(1, &m_id);
+
+	// Bind texture object
+	glBindTexture(GL_TEXTURE_2D, m_id);
+
+	// Generate texture
+	glTexImage2D(
+		GL_TEXTURE_2D,     // Texture target
+		0,                 // Midmap level, base starts at level 0
+		m_internalFormat,  // Texture format
+		m_width, m_height, // Image width/height
+		0,                 // Always 0 (legacy)
+		m_dataFormat,      // Texture source format
+		m_dataType,        // Texture source datatype
+		NULL);             // Image data
+
+	glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
+	glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
+
+	// Unbind texture object
+	glBindTexture(GL_TEXTURE_2D, 0);
+}
+
 } // namespace Inferno

src/inferno/asset/texture.h

@@ -10,20 +10,23 @@
 #include <memory>  // std::shared_ptr
 #include <string_view>
 
+#include "glad/glad.h"
+
 #include "inferno/asset/asset-manager.h"
 
 struct aiTexture;
 
 namespace Inferno {
 
-class Texture2D;
-class TextureCubemap;
-
 class Texture : public Asset {
 public:
 	virtual ~Texture();
 
+	static void savePNG(std::string_view path, std::shared_ptr<Texture> texture);
+	static void saveScreenshotPNG(std::string_view path, uint32_t width, uint32_t height);
+
 	void init(uint32_t width, uint32_t height, uint8_t channels);
+	void init(uint32_t width, uint32_t height, uint32_t internalFormat, uint32_t dataFormat, uint32_t dataType);
 
 	virtual void bind(uint32_t unit = 0) const = 0;
 	virtual void unbind() const = 0;
@@ -33,12 +36,11 @@ public:
 	uint32_t id() const { return m_id; }
 	uint32_t internalFormat() const { return m_internalFormat; }
 	uint32_t dataFormat() const { return m_dataFormat; }
+	uint32_t dataType() const { return m_dataType; }
 
-	virtual bool is2D() const { return false; }
-	virtual bool isCubemap() const { return false; }
-
-	friend Texture2D;
-	friend TextureCubemap;
+	virtual bool isTexture2D() const override { return false; }
+	virtual bool isTextureCubemap() const override { return false; }
+	virtual bool isTextureFramebuffer() const override { return false; }
 
 protected:
 	Texture(std::string_view path)
@@ -52,6 +54,7 @@ protected:
 	uint32_t m_id { 0 };
 	uint32_t m_internalFormat { 0 };
 	uint32_t m_dataFormat { 0 };
+	uint32_t m_dataType { GL_UNSIGNED_BYTE };
 
 private:
 	virtual bool isTexture() const override { return true; }
@@ -76,10 +79,9 @@ private:
 	{
 	}
 
-	virtual bool isTexture2D() const override { return true; }
+	void createImpl(unsigned char* data);
 
-private:
-	void create(unsigned char* data);
+	virtual bool isTexture2D() const override { return true; }
 };
 
 // -------------------------------------
@@ -100,10 +102,34 @@ private:
 	{
 	}
 
+	void createImpl();
+
 	virtual bool isTextureCubemap() const override { return true; }
+};
+
+// -----------------------------------------
+
+class TextureFramebuffer final : public Texture {
+public:
+	virtual ~TextureFramebuffer() = default;
+
+	// Factory function
+	static std::shared_ptr<TextureFramebuffer> create(
+		std::string_view path,
+		uint32_t width, uint32_t height, uint32_t internalFormat, uint32_t dataFormat, uint32_t dataType = GL_UNSIGNED_BYTE);
+
+	virtual void bind(uint32_t unit) const override;
+	virtual void unbind() const override;
 
 private:
-	void create();
+	TextureFramebuffer(std::string_view path)
+		: Texture(path)
+	{
+	}
+
+	void createImpl();
+
+	virtual bool isTextureFramebuffer() const override { return true; }
 };
 
 // -----------------------------------------
@@ -117,6 +143,9 @@ inline bool Asset::fastIs<Texture2D>() const { return isTexture2D(); }
 
 template<>
 inline bool Asset::fastIs<TextureCubemap>() const { return isTextureCubemap(); }
+
+template<>
+inline bool Asset::fastIs<TextureFramebuffer>() const { return isTextureFramebuffer(); }
 // clang-format on
 
 } // namespace Inferno

src/inferno/component/cubemap-component.cpp

@@ -8,7 +8,7 @@
 
 #include "inferno/asset/texture.h"
 #include "inferno/component/cubemap-component.h"
-#include "inferno/component/spritecomponent.h" // TODO: Move glm::x toJson/fromJson to separate file
+#include "inferno/component/serialize.h" // not detected as used by clang-tidy
 
 namespace Inferno {
 
@@ -22,6 +22,9 @@ void fromJson(const ruc::Json& json, CubemapComponent& value)
 	if (json.exists("texture") && json.at("texture").type() == ruc::Json::Type::String) {
 		value.texture = AssetManager::the().load<TextureCubemap>(json.at("texture").asString());
 	}
+	if (json.exists("isLight")) {
+		json.at("isLight").getTo(value.isLight);
+	}
 }
 
 } // namespace Inferno

src/inferno/component/cubemap-component.h

@@ -18,6 +18,7 @@ namespace Inferno {
 struct CubemapComponent {
 	glm::vec4 color { 1.0f };
 	std::shared_ptr<Texture> texture;
+	bool isLight { false };
 };
 
 void fromJson(const ruc::Json& json, CubemapComponent& value);

src/inferno/component/model-component.cpp

@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 2024 Riyyi
+ * Copyright (C) 2022 Riyyi
  *
  * SPDX-License-Identifier: MIT
  */
@@ -8,6 +8,7 @@
 #include "inferno/asset/asset-manager.h"
 #include "inferno/asset/model.h"
 #include "inferno/asset/texture.h"
+#include "inferno/component/serialize.h" // not detected as used by clang-tidy
 
 namespace Inferno {
 
@@ -15,6 +16,9 @@ void fromJson(const ruc::Json& json, ModelComponent& value)
 {
 	VERIFY(json.type() == ruc::Json::Type::Object);
 
+	if (json.exists("color")) {
+		json.at("color").getTo(value.color);
+	}
 	if (json.exists("model") && json.at("model").type() == ruc::Json::Type::String) {
 		value.model = AssetManager::the().load<Model>(json.at("model").asString());
 	}

src/inferno/component/model-component.h

@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 2024 Riyyi
+ * Copyright (C) 2022 Riyyi
  *
  * SPDX-License-Identifier: MIT
  */
@@ -16,6 +16,7 @@
 namespace Inferno {
 
 struct ModelComponent {
+	glm::vec4 color { 1.0f };
 	std::shared_ptr<Model> model;
 	std::shared_ptr<Texture2D> texture;
 };

src/inferno/component/serialize.cpp

@@ -0,0 +1,127 @@
+/*
+ * Copyright (C) 2024 Riyyi
+ *
+ * SPDX-License-Identifier: MIT
+ */
+
+#include "glm/ext/matrix_float2x2.hpp"
+#include "glm/ext/matrix_float3x3.hpp"
+#include "glm/ext/matrix_float4x4.hpp"
+#include "glm/ext/vector_float2.hpp"
+#include "glm/ext/vector_float3.hpp"
+#include "glm/ext/vector_float4.hpp"
+#include "ruc/json/json.h"
+
+#include "inferno/component/serialize.h"
+
+namespace glm {
+
+void toJson(ruc::Json& json, const vec2& value)
+{
+	json = ruc::Json {
+		{ value.x, value.y },
+	};
+}
+
+void fromJson(const ruc::Json& json, vec2& value)
+{
+	VERIFY(json.type() == ruc::Json::Type::Array);
+
+	auto& values = json.asArray();
+	VERIFY(values.size() == 2, "glm::vec2 expected 2 values, got: {}", values.size());
+
+	value.x = values.at(0).get<float>();
+	value.y = values.at(1).get<float>();
+}
+
+// -----------------------------------------
+
+void toJson(ruc::Json& json, const vec3& value)
+{
+	json = ruc::Json {
+		{ value.x, value.y, value.z },
+	};
+}
+
+void fromJson(const ruc::Json& json, vec3& value)
+{
+	VERIFY(json.type() == ruc::Json::Type::Array);
+
+	auto& values = json.asArray();
+	VERIFY(values.size() == 3, "glm::vec3 expected 3 values, got: {}", values.size());
+
+	value.x = values.at(0).get<float>();
+	value.y = values.at(1).get<float>();
+	value.z = values.at(2).get<float>();
+}
+
+// -----------------------------------------
+
+void toJson(ruc::Json& json, const vec4& value)
+{
+	json = ruc::Json {
+		{ value.r, value.g, value.b, value.a },
+	};
+}
+
+void fromJson(const ruc::Json& json, vec4& value)
+{
+	VERIFY(json.type() == ruc::Json::Type::Array);
+
+	auto& values = json.asArray();
+	VERIFY(values.size() == 4, "glm::vec4 expected 4 values, got: {}", values.size());
+
+	value.r = values.at(0).get<float>();
+	value.g = values.at(1).get<float>();
+	value.b = values.at(2).get<float>();
+	value.a = values.at(3).get<float>();
+}
+
+} // namespace glm
+
+// -----------------------------------------
+
+void ruc::format::Formatter<glm::vec2>::format(Builder& builder, glm::vec2 value) const
+{
+	return Formatter<std::vector<float>>::format(builder, { value.x, value.y });
+}
+
+void ruc::format::Formatter<glm::vec3>::format(Builder& builder, glm::vec3 value) const
+{
+	return Formatter<std::vector<float>>::format(builder, { value.x, value.y, value.z });
+}
+
+void ruc::format::Formatter<glm::vec4>::format(Builder& builder, glm::vec4 value) const
+{
+	return Formatter<std::vector<float>>::format(builder, { value.x, value.y, value.z, value.w });
+}
+
+void ruc::format::Formatter<glm::mat2>::format(Builder& builder, glm::mat2 value) const
+{
+	builder.putString("mat2 ");
+	Formatter<glm::vec2>::format(builder, value[0]);
+	builder.putString("\n     ");
+	return Formatter<glm::vec2>::format(builder, value[1]);
+}
+
+void ruc::format::Formatter<glm::mat3>::format(Builder& builder, glm::mat3 value) const
+{
+	builder.putString("mat3 ");
+	Formatter<glm::vec3>::format(builder, value[0]);
+	builder.putString("\n     ");
+	Formatter<glm::vec3>::format(builder, value[1]);
+	builder.putString("\n     ");
+	return Formatter<glm::vec3>::format(builder, value[2]);
+}
+
+void ruc::format::Formatter<glm::mat4>::format(Builder& builder, glm::mat4 value) const
+{
+	builder.putString("mat4 ");
+	Formatter<glm::vec4>::format(builder, value[0]);
+	builder.putString("\n     ");
+	Formatter<glm::vec4>::format(builder, value[1]);
+	builder.putString("\n     ");
+	Formatter<glm::vec4>::format(builder, value[2]);
+	builder.putString("\n     ");
+	return Formatter<glm::vec4>::format(builder, value[3]);
+}

src/inferno/component/serialize.h

@@ -0,0 +1,58 @@
+/*
+ * Copyright (C) 2024 Riyyi
+ *
+ * SPDX-License-Identifier: MIT
+ */
+
+#pragma once
+
+#include "glm/ext/matrix_float2x2.hpp"
+#include "glm/ext/matrix_float3x3.hpp"
+#include "glm/ext/matrix_float4x4.hpp"
+#include "glm/ext/vector_float2.hpp"
+#include "glm/ext/vector_float3.hpp"
+#include "glm/ext/vector_float4.hpp"
+#include "ruc/json/json.h"
+
+namespace glm {
+
+void toJson(ruc::Json& json, const vec2& value);
+void fromJson(const ruc::Json& json, vec2& value);
+
+void toJson(ruc::Json& json, const vec3& value);
+void fromJson(const ruc::Json& json, vec3& value);
+
+void toJson(ruc::Json& json, const vec4& value);
+void fromJson(const ruc::Json& json, vec4& value);
+
+} // namespace glm
+
+template<>
+struct ruc::format::Formatter<glm::vec2> : Formatter<std::vector<float>> {
+	void format(Builder& builder, glm::vec2 value) const;
+};
+
+template<>
+struct ruc::format::Formatter<glm::vec3> : Formatter<std::vector<float>> {
+	void format(Builder& builder, glm::vec3 value) const;
+};
+
+template<>
+struct ruc::format::Formatter<glm::vec4> : Formatter<std::vector<float>> {
+	void format(Builder& builder, glm::vec4 value) const;
+};
+
+template<>
+struct ruc::format::Formatter<glm::mat2> : Formatter<glm::vec2> {
+	void format(Builder& builder, glm::mat2 value) const;
+};
+
+template<>
+struct ruc::format::Formatter<glm::mat3> : Formatter<glm::vec3> {
+	void format(Builder& builder, glm::mat3 value) const;
+};
+
+template<>
+struct ruc::format::Formatter<glm::mat4> : Formatter<glm::vec4> {
+	void format(Builder& builder, glm::mat4 value) const;
+};

src/inferno/component/spritecomponent.cpp

@@ -4,9 +4,12 @@
  * SPDX-License-Identifier: MIT
  */
 
-#include "inferno/component/spritecomponent.h"
+#include "ruc/json/json.h"
+
 #include "inferno/asset/asset-manager.h"
 #include "inferno/asset/texture.h"
+#include "inferno/component/serialize.h" // not detected as used by clang-tidy
+#include "inferno/component/spritecomponent.h"
 
 namespace Inferno {
 
@@ -23,27 +26,3 @@ void fromJson(const ruc::Json& json, SpriteComponent& value)
 }
 
 } // namespace Inferno
-
-namespace glm {
-
-void toJson(ruc::Json& json, const vec4& value)
-{
-	json = ruc::Json {
-		{ value.r, value.g, value.b, value.a },
-	};
-}
-
-void fromJson(const ruc::Json& json, vec4& value)
-{
-	VERIFY(json.type() == ruc::Json::Type::Array);
-
-	auto& values = json.asArray();
-	VERIFY(values.size() == 4, "glm::vec4 expects 4 values, not {}", values.size());
-
-	value.r = values.at(0).get<float>();
-	value.g = values.at(1).get<float>();
-	value.b = values.at(2).get<float>();
-	value.a = values.at(3).get<float>();
-}
-
-} // namespace glm

src/inferno/component/spritecomponent.h

@@ -23,10 +23,3 @@ struct SpriteComponent {
 void fromJson(const ruc::Json& json, SpriteComponent& value);
 
 } // namespace Inferno
-
-namespace glm {
-
-void toJson(ruc::Json& json, const vec4& value);
-void fromJson(const ruc::Json& json, vec4& value);
-
-} // namespace glm

src/inferno/component/transformcomponent.cpp

@@ -7,6 +7,7 @@
 #include "ruc/format/format.h"
 #include "ruc/json/json.h"
 
+#include "inferno/component/serialize.h"
 #include "inferno/component/transformcomponent.h"
 
 namespace Inferno {
@@ -28,56 +29,6 @@ void fromJson(const ruc::Json& json, TransformComponent& value)
 
 } // namespace Inferno
 
-namespace glm {
-
-void toJson(ruc::Json& json, const vec3& value)
-{
-	json = ruc::Json {
-		{ value.x, value.y, value.z },
-	};
-}
-
-void fromJson(const ruc::Json& json, vec3& value)
-{
-	VERIFY(json.type() == ruc::Json::Type::Array);
-
-	auto& values = json.asArray();
-	VERIFY(values.size() == 3, "glm::vec3 expects 3 values, not {}", values.size());
-
-	value.x = values.at(0).get<float>();
-	value.y = values.at(1).get<float>();
-	value.z = values.at(2).get<float>();
-}
-
-} // namespace glm
-
-void ruc::format::Formatter<glm::vec2>::format(Builder& builder, glm::vec2 value) const
-{
-	return Formatter<std::vector<float>>::format(builder, { value.x, value.y });
-}
-
-void ruc::format::Formatter<glm::vec3>::format(Builder& builder, glm::vec3 value) const
-{
-	return Formatter<std::vector<float>>::format(builder, { value.x, value.y, value.z });
-}
-
-void ruc::format::Formatter<glm::vec4>::format(Builder& builder, glm::vec4 value) const
-{
-	return Formatter<std::vector<float>>::format(builder, { value.x, value.y, value.z, value.w });
-}
-
-void ruc::format::Formatter<glm::mat4>::format(Builder& builder, glm::mat4 value) const
-{
-	builder.putString("mat4 ");
-	Formatter<glm::vec4>::format(builder, value[0]);
-	builder.putString("\n     ");
-	Formatter<glm::vec4>::format(builder, value[1]);
-	builder.putString("\n     ");
-	Formatter<glm::vec4>::format(builder, value[2]);
-	builder.putString("\n     ");
-	return Formatter<glm::vec4>::format(builder, value[3]);
-}
-
 void ruc::format::Formatter<Inferno::TransformComponent>::format(Builder& builder, Inferno::TransformComponent value) const
 {
 	builder.putString("transform ");

src/inferno/component/transformcomponent.h

@@ -6,9 +6,6 @@
 
 #pragma once
 
-#include <cstdint> // uint32_t
-#include <optional>
-
 #include "entt/entity/entity.hpp"      // entt::null
 #include "entt/entity/fwd.hpp"         // entt::entity
 #include "glm/ext/matrix_float4x4.hpp" // glm::mat4
@@ -31,33 +28,6 @@ void fromJson(const ruc::Json& json, TransformComponent& value);
 
 } // namespace Inferno
 
-namespace glm {
-
-void toJson(ruc::Json& json, const vec3& value);
-void fromJson(const ruc::Json& json, vec3& value);
-
-} // namespace glm
-
-template<>
-struct ruc::format::Formatter<glm::vec2> : Formatter<std::vector<float>> {
-	void format(Builder& builder, glm::vec2 value) const;
-};
-
-template<>
-struct ruc::format::Formatter<glm::vec3> : Formatter<std::vector<float>> {
-	void format(Builder& builder, glm::vec3 value) const;
-};
-
-template<>
-struct ruc::format::Formatter<glm::vec4> : Formatter<std::vector<float>> {
-	void format(Builder& builder, glm::vec4 value) const;
-};
-
-template<>
-struct ruc::format::Formatter<glm::mat4> : Formatter<glm::vec4> {
-	void format(Builder& builder, glm::mat4 value) const;
-};
-
 template<>
 struct ruc::format::Formatter<Inferno::TransformComponent> : Formatter<glm::vec3> {
 	void format(Builder& builder, Inferno::TransformComponent value) const;

src/inferno/event/keyevent.h

@@ -14,24 +14,27 @@ namespace Inferno {
 
 class KeyEvent : public Event {
 public:
-	inline int getKey() const { return m_key; }
+	int getKey() const { return m_key; }
+	int getMods() const { return m_mods; }
 
 	EVENT_CLASS_CATEGORY(InputEventCategory | KeyEventCategory)
 
 protected:
-	KeyEvent(int key)
+	KeyEvent(int key, int mods)
 		: m_key(key)
+		, m_mods(mods)
 	{
 	}
 
 private:
-	int m_key;
+	int m_key { 0 };
+	int m_mods { 0 };
 };
 
-class KeyPressEvent : public KeyEvent {
+class KeyPressEvent final : public KeyEvent {
 public:
-	KeyPressEvent(int key)
-		: KeyEvent(key)
+	KeyPressEvent(int key, int mods)
+		: KeyEvent(key, mods)
 	{
 	}
 
@@ -45,10 +48,10 @@ public:
 	EVENT_CLASS_TYPE(KeyPress)
 };
 
-class KeyReleaseEvent : public KeyEvent {
+class KeyReleaseEvent final : public KeyEvent {
 public:
-	KeyReleaseEvent(int key)
-		: KeyEvent(key)
+	KeyReleaseEvent(int key, int mods)
+		: KeyEvent(key, mods)
 	{
 	}
 
@@ -59,13 +62,13 @@ public:
 		return ss.str();
 	}
 
-	EVENT_CLASS_TYPE(KeyPress)
+	EVENT_CLASS_TYPE(KeyRelease)
 };
 
-class KeyRepeatEvent : public KeyEvent {
+class KeyRepeatEvent final : public KeyEvent {
 public:
-	KeyRepeatEvent(int key)
-		: KeyEvent(key)
+	KeyRepeatEvent(int key, int mods)
+		: KeyEvent(key, mods)
 	{
 	}
 
@@ -76,7 +79,7 @@ public:
 		return ss.str();
 	}
 
-	EVENT_CLASS_TYPE(KeyPress)
+	EVENT_CLASS_TYPE(KeyRepeat)
 };
 
 } // namespace Inferno

src/inferno/keycodes.cpp

@@ -139,14 +139,33 @@ static std::unordered_map<std::string_view, int> keys({
 	{ MAP_KEY(GLFW_KEY_MENU) },
 });
 
+static std::unordered_map<std::string_view, int> modifiers({
+	{ MAP_KEY(GLFW_MOD_SHIFT) },
+	{ MAP_KEY(GLFW_MOD_CONTROL) },
+	{ MAP_KEY(GLFW_MOD_ALT) },
+	{ MAP_KEY(GLFW_MOD_SUPER) },
+	{ MAP_KEY(GLFW_MOD_CAPS_LOCK) }, // State, not really a modifier
+	{ MAP_KEY(GLFW_MOD_NUM_LOCK) },  // State, not really a modifier
+});
+
 // -----------------------------------------
 
+// Example usage:
+//   event.getKey() == keyCode("GLFW_KEY_ESCAPE")
 int keyCode(std::string_view name)
 {
 	VERIFY(keys.find(name) != keys.end(), "could not find key code: {}", name);
 	return keys.at(name);
 }
 
+// Example usage:
+//   event.getMods() & keyMod("GLFW_MOD_SHIFT")
+int keyMod(std::string_view name)
+{
+	VERIFY(modifiers.find(name) != modifiers.end(), "could not find key modifier: {}", name);
+	return modifiers.at(name);
+}
+
 std::string_view keyName(int key)
 {
 	auto it = std::find_if(keys.begin(), keys.end(), [key](const auto& keybind) {

src/inferno/keycodes.h

@@ -13,6 +13,8 @@
 namespace Inferno {
 
 int keyCode(std::string_view name);
-std::string_view keyName(int);
+int keyMod(std::string_view name);
+
+std::string_view keyName(int key);
 
 } // namespace Inferno

src/inferno/render/buffer.cpp

@@ -4,12 +4,17 @@
  * SPDX-License-Identifier: MIT
  */
 
-#include "glad/glad.h"
+#include <cstddef> // size_t
+#include <cstdint> // int32_t, uint8_t, uint32_t
+#include <memory>  // std::shared_ptr
+#include <string>
+#include <utility> // std::pair
 
-#include "inferno/core.h"
-#include "inferno/render/buffer.h"
+#include "glad/glad.h"
 #include "ruc/meta/assert.h"
 
+#include "inferno/render/buffer.h"
+
 namespace Inferno {
 
 // -----------------------------------------
@@ -37,113 +42,78 @@ uint32_t BufferElement::getTypeGL() const
 	return BufferElement::getTypeGL(m_type);
 }
 
-uint32_t BufferElement::getTypeSize(const BufferElementType type)
+uint32_t BufferElement::getTypeSize(BufferElementType type)
 {
 	switch (type) {
 	case BufferElementType::None:
 		return 0;
 	case BufferElementType::Bool:
-		return sizeof(bool);
 	case BufferElementType::Bool2:
-		return sizeof(bool) * 2;
 	case BufferElementType::Bool3:
-		return sizeof(bool) * 3;
 	case BufferElementType::Bool4:
-		return sizeof(bool) * 4;
+		return sizeof(bool) * getTypeCount(type);
 	case BufferElementType::Int:
-		return sizeof(int32_t);
 	case BufferElementType::Int2:
-		return sizeof(int32_t) * 2;
 	case BufferElementType::Int3:
-		return sizeof(int32_t) * 3;
 	case BufferElementType::Int4:
-		return sizeof(int32_t) * 4;
+		return sizeof(int32_t) * getTypeCount(type);
 	case BufferElementType::Uint:
-		return sizeof(uint32_t);
 	case BufferElementType::Uint2:
-		return sizeof(uint32_t) * 2;
 	case BufferElementType::Uint3:
-		return sizeof(uint32_t) * 3;
 	case BufferElementType::Uint4:
-		return sizeof(uint32_t) * 4;
+		return sizeof(uint32_t) * getTypeCount(type);
 	case BufferElementType::Float:
-		return sizeof(float);
 	case BufferElementType::Vec2:
-		return sizeof(float) * 2;
 	case BufferElementType::Vec3:
-		return sizeof(float) * 3;
 	case BufferElementType::Vec4:
-		return sizeof(float) * 4;
+		return sizeof(float) * getTypeCount(type);
 	case BufferElementType::Double:
-		return sizeof(double);
-	case BufferElementType::Double2:
-		return sizeof(double);
-	case BufferElementType::Double3:
-		return sizeof(double);
-	case BufferElementType::Double4:
-		return sizeof(double);
+	case BufferElementType::Vec2Double:
+	case BufferElementType::Vec3Double:
+	case BufferElementType::Vec4Double:
+		return sizeof(double) * getTypeCount(type);
 	case BufferElementType::Mat2:
-		return sizeof(float) * 2 * 2;
 	case BufferElementType::Mat3:
-		return sizeof(float) * 3 * 3;
 	case BufferElementType::Mat4:
-		return sizeof(float) * 4 * 4;
-	case BufferElementType::DoubleMat2:
-		return sizeof(double) * 2 * 2;
-	case BufferElementType::DoubleMat3:
-		return sizeof(double) * 3 * 3;
-	case BufferElementType::DoubleMat4:
-		return sizeof(double) * 4 * 4;
+		return sizeof(float) * getTypeCount(type);
+	case BufferElementType::MatDouble2:
+	case BufferElementType::MatDouble3:
+	case BufferElementType::MatDouble4:
+		return sizeof(double) * getTypeCount(type);
 	};
 
 	VERIFY(false, "BufferElement unknown BufferElementType size!");
 	return 0;
 }
 
-uint32_t BufferElement::getTypeCount(const BufferElementType type)
+uint32_t BufferElement::getTypeCount(BufferElementType type)
 {
 	switch (type) {
 	case BufferElementType::None:
 		return 0;
 	case BufferElementType::Bool:
-		return 1;
-	case BufferElementType::Bool2:
-		return 2;
-	case BufferElementType::Bool3:
-		return 3;
-	case BufferElementType::Bool4:
-		return 4;
 	case BufferElementType::Int:
-		return 1;
-	case BufferElementType::Int2:
-		return 2;
-	case BufferElementType::Int3:
-		return 3;
-	case BufferElementType::Int4:
-		return 4;
 	case BufferElementType::Uint:
-		return 1;
-	case BufferElementType::Uint2:
-		return 2;
-	case BufferElementType::Uint3:
-		return 3;
-	case BufferElementType::Uint4:
-		return 4;
 	case BufferElementType::Float:
-		return 1;
-	case BufferElementType::Vec2:
-		return 2;
-	case BufferElementType::Vec3:
-		return 3;
-	case BufferElementType::Vec4:
-		return 4;
 	case BufferElementType::Double:
 		return 1;
-	case BufferElementType::Double2:
+	case BufferElementType::Bool2:
+	case BufferElementType::Int2:
+	case BufferElementType::Uint2:
+	case BufferElementType::Vec2:
+	case BufferElementType::Vec2Double:
 		return 2;
-	case BufferElementType::Double3:
+	case BufferElementType::Bool3:
+	case BufferElementType::Int3:
+	case BufferElementType::Uint3:
+	case BufferElementType::Vec3:
+	case BufferElementType::Vec3Double:
 		return 3;
-	case BufferElementType::Double4:
+	case BufferElementType::Bool4:
+	case BufferElementType::Int4:
+	case BufferElementType::Uint4:
+	case BufferElementType::Vec4:
+	case BufferElementType::Vec4Double:
 		return 4;
 	case BufferElementType::Mat2:
 		return 2 * 2;
@@ -151,11 +121,11 @@ uint32_t BufferElement::getTypeCount(const BufferElementType type)
 		return 3 * 3;
 	case BufferElementType::Mat4:
 		return 4 * 4;
-	case BufferElementType::DoubleMat2:
+	case BufferElementType::MatDouble2:
 		return 2 * 2;
-	case BufferElementType::DoubleMat3:
+	case BufferElementType::MatDouble3:
 		return 3 * 3;
-	case BufferElementType::DoubleMat4:
+	case BufferElementType::MatDouble4:
 		return 4 * 4;
 	};
 
@@ -163,62 +133,43 @@ uint32_t BufferElement::getTypeCount(const BufferElementType type)
 	return 0;
 }
 
-uint32_t BufferElement::getTypeGL(const BufferElementType type)
+uint32_t BufferElement::getTypeGL(BufferElementType type)
 {
 	switch (type) {
 	case BufferElementType::None:
 		return GL_NONE;
 	case BufferElementType::Bool:
-		return GL_BOOL;
 	case BufferElementType::Bool2:
-		return GL_BOOL;
 	case BufferElementType::Bool3:
-		return GL_BOOL;
 	case BufferElementType::Bool4:
 		return GL_BOOL;
 	case BufferElementType::Int:
-		return GL_INT;
 	case BufferElementType::Int2:
-		return GL_INT;
 	case BufferElementType::Int3:
-		return GL_INT;
 	case BufferElementType::Int4:
 		return GL_INT;
 	case BufferElementType::Uint:
-		return GL_UNSIGNED_INT;
 	case BufferElementType::Uint2:
-		return GL_UNSIGNED_INT;
 	case BufferElementType::Uint3:
-		return GL_UNSIGNED_INT;
 	case BufferElementType::Uint4:
 		return GL_UNSIGNED_INT;
 	case BufferElementType::Float:
-		return GL_FLOAT;
 	case BufferElementType::Vec2:
-		return GL_FLOAT;
 	case BufferElementType::Vec3:
-		return GL_FLOAT;
 	case BufferElementType::Vec4:
 		return GL_FLOAT;
 	case BufferElementType::Double:
-		return GL_DOUBLE;
-	case BufferElementType::Double2:
-		return GL_DOUBLE;
-	case BufferElementType::Double3:
-		return GL_DOUBLE;
-	case BufferElementType::Double4:
+	case BufferElementType::Vec2Double:
+	case BufferElementType::Vec3Double:
+	case BufferElementType::Vec4Double:
 		return GL_DOUBLE;
 	case BufferElementType::Mat2:
-		return GL_FLOAT;
 	case BufferElementType::Mat3:
-		return GL_FLOAT;
 	case BufferElementType::Mat4:
 		return GL_FLOAT;
-	case BufferElementType::DoubleMat2:
-		return GL_DOUBLE;
-	case BufferElementType::DoubleMat3:
-		return GL_DOUBLE;
-	case BufferElementType::DoubleMat4:
+	case BufferElementType::MatDouble2:
+	case BufferElementType::MatDouble3:
+	case BufferElementType::MatDouble4:
 		return GL_DOUBLE;
 	};
 
@@ -226,6 +177,58 @@ uint32_t BufferElement::getTypeGL(const BufferElementType type)
 	return 0;
 }
 
+uint32_t BufferElement::getGLTypeSize(uint32_t type)
+{
+	switch (type) {
+	case GL_BOOL:
+	case GL_INT:
+	case GL_UNSIGNED_INT:
+	case GL_FLOAT:
+		return 4;
+	case GL_BOOL_VEC2:
+	case GL_INT_VEC2:
+	case GL_UNSIGNED_INT_VEC2:
+	case GL_FLOAT_VEC2:
+		return 4 * 2;
+	case GL_BOOL_VEC3:
+	case GL_INT_VEC3:
+	case GL_UNSIGNED_INT_VEC3:
+	case GL_FLOAT_VEC3:
+		return 4 * 3;
+	case GL_BOOL_VEC4:
+	case GL_INT_VEC4:
+	case GL_UNSIGNED_INT_VEC4:
+	case GL_FLOAT_VEC4:
+		return 4 * 4;
+	case GL_FLOAT_MAT2:
+		return 4 * 2 * 2;
+	case GL_FLOAT_MAT3:
+		return 4 * 3 * 3;
+	case GL_FLOAT_MAT4:
+		return 4 * 4 * 4;
+
+	case GL_DOUBLE:
+		return 8;
+	case GL_DOUBLE_VEC2:
+		return 8 * 2;
+	case GL_DOUBLE_VEC3:
+		return 8 * 3;
+	case GL_DOUBLE_VEC4:
+		return 8 * 4;
+	case GL_DOUBLE_MAT2:
+		return 8 * 2 * 2;
+	case GL_DOUBLE_MAT3:
+		return 8 * 3 * 3;
+	case GL_DOUBLE_MAT4:
+		return 8 * 4 * 4;
+
+	default:
+		VERIFY_NOT_REACHED();
+	};
+
+	return 0;
+}
+
 // -----------------------------------------
 
 BufferLayout::BufferLayout(const std::initializer_list<BufferElement>& elements)
@@ -239,30 +242,25 @@ void BufferLayout::calculateOffsetsAndStride()
 	m_stride = 0;
 	for (auto& element : m_elements) {
 		element.setOffset(m_stride);
-		m_stride += element.getSize();
+		m_stride += element.size();
 	}
 }
 
 // -----------------------------------------
 
 VertexBuffer::VertexBuffer(size_t size)
+	: VertexBuffer(size, nullptr)
 {
-	glGenBuffers(1, &m_id);
-	bind();
-
-	// Reserve data on the GPU
-	glBufferData(GL_ARRAY_BUFFER, size, nullptr, GL_DYNAMIC_DRAW);
-
-	unbind();
 }
 
-VertexBuffer::VertexBuffer(float* vertices, size_t size)
+VertexBuffer::VertexBuffer(size_t size, float* vertices)
 {
+	m_id = UINT_MAX;
 	glGenBuffers(1, &m_id);
 	bind();
 
 	// Upload data to the GPU
-	glBufferData(GL_ARRAY_BUFFER, size, vertices, GL_STATIC_DRAW);
+	glBufferData(GL_ARRAY_BUFFER, size, vertices, GL_DYNAMIC_DRAW);
 
 	unbind();
 }
@@ -297,11 +295,12 @@ void VertexBuffer::uploadData(const void* data, uint32_t size)
 IndexBuffer::IndexBuffer(uint32_t* indices, size_t size)
 	: m_count(size / sizeof(uint32_t))
 {
+	m_id = UINT_MAX;
 	glCreateBuffers(1, &m_id);
 	bind();
 
 	// Upload data to the GPU
-	glBufferData(GL_ELEMENT_ARRAY_BUFFER, size, indices, GL_STATIC_DRAW);
+	glBufferData(GL_ELEMENT_ARRAY_BUFFER, size, indices, GL_DYNAMIC_DRAW);
 
 	unbind();
 }
@@ -335,6 +334,7 @@ void IndexBuffer::uploadData(const void* data, uint32_t size)
 
 VertexArray::VertexArray()
 {
+	m_id = UINT_MAX;
 	glCreateVertexArrays(1, &m_id);
 }
 
@@ -355,8 +355,8 @@ void VertexArray::unbind() const
 
 void VertexArray::addVertexBuffer(std::shared_ptr<VertexBuffer> vertexBuffer)
 {
-	const auto& layout = vertexBuffer->getLayout();
-	VERIFY(layout.getElements().size(), "VertexBuffer has no layout");
+	const auto& layout = vertexBuffer->layout();
+	VERIFY(layout.elements().size(), "VertexBuffer has no layout");
 
 	bind();
 	vertexBuffer->bind();
@@ -364,20 +364,71 @@ void VertexArray::addVertexBuffer(std::shared_ptr<VertexBuffer> vertexBuffer)
 	uint32_t index = 0;
 	for (const auto& element : layout) {
 		glEnableVertexAttribArray(index);
+		switch (element.type()) {
+		case BufferElementType::None:
+			break;
+		case BufferElementType::Int:
+		case BufferElementType::Int2:
+		case BufferElementType::Int3:
+		case BufferElementType::Int4:
+		case BufferElementType::Uint:
+		case BufferElementType::Uint2:
+		case BufferElementType::Uint3:
+		case BufferElementType::Uint4: {
+			glVertexAttribIPointer(
+				index,
+				element.getTypeCount(),
+				element.getTypeGL(),
+				layout.stride(),
+				reinterpret_cast<const void*>(element.offset()));
+			break;
+		}
+		case BufferElementType::Bool:
+		case BufferElementType::Bool2:
+		case BufferElementType::Bool3:
+		case BufferElementType::Bool4:
+		case BufferElementType::Float:
+		case BufferElementType::Vec2:
+		case BufferElementType::Vec3:
+		case BufferElementType::Vec4:
+		case BufferElementType::Mat2:
+		case BufferElementType::Mat3:
+		case BufferElementType::Mat4: {
 			glVertexAttribPointer(
 				index,
 				element.getTypeCount(),
 				element.getTypeGL(),
-			element.getNormalized() ? GL_TRUE : GL_FALSE,
-			layout.getStride(),
-			reinterpret_cast<const void*>(element.getOffset()));
+				element.normalized() ? GL_TRUE : GL_FALSE,
+				layout.stride(),
+				reinterpret_cast<const void*>(element.offset()));
+			break;
+		}
+		case BufferElementType::Double:
+		case BufferElementType::Vec2Double:
+		case BufferElementType::Vec3Double:
+		case BufferElementType::Vec4Double:
+		case BufferElementType::MatDouble2:
+		case BufferElementType::MatDouble3:
+		case BufferElementType::MatDouble4: {
+			glVertexAttribLPointer(
+				index,
+				element.getTypeCount(),
+				element.getTypeGL(),
+				layout.stride(),
+				reinterpret_cast<const void*>(element.offset()));
+			break;
+		}
+		default:
+			VERIFY_NOT_REACHED();
+		};
 
 		index++;
 	}
-	m_vertexBuffers.push_back(std::move(vertexBuffer));
 
 	unbind();
 	vertexBuffer->unbind();
+
+	m_vertexBuffers.push_back(std::move(vertexBuffer));
 }
 
 void VertexArray::setIndexBuffer(std::shared_ptr<IndexBuffer> indexBuffer)
@@ -385,10 +436,10 @@ void VertexArray::setIndexBuffer(std::shared_ptr<IndexBuffer> indexBuffer)
 	bind();
 	indexBuffer->bind();
 
-	m_indexBuffer = std::move(indexBuffer);
-
 	unbind();
 	indexBuffer->unbind();
+
+	m_indexBuffer = std::move(indexBuffer);
 }
 
 } // namespace Inferno

src/inferno/render/buffer.h

@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 2022 Riyyi
+ * Copyright (C) 2022,2024 Riyyi
  *
  * SPDX-License-Identifier: MIT
  */
@@ -7,52 +7,54 @@
 #pragma once
 
 #include <cstddef> // size_t
-#include <cstdint> // int32_t, uint32_t
+#include <cstdint> // int32_t, uint8_t, uint32_t
 #include <memory>  // std::shared_ptr
-#include <string>  // std::string
-#include <vector>  // std::vector
+#include <string>
+#include <vector>
 
 namespace Inferno {
 
 // clang-format off
 // https://www.khronos.org/opengl/wiki/Data_Type_(GLSL)
-enum class BufferElementType {
+enum class BufferElementType : uint8_t {
 	None = 0,
 	Bool, Bool2, Bool3, Bool4,                      // bvec
 	Int, Int2, Int3, Int4,                          // ivec
 	Uint, Uint2, Uint3, Uint4,                      // uvec
 	Float, Vec2, Vec3, Vec4,                        // vec
-	Double, Double2, Double3, Double4,  // dvec
+	Double, Vec2Double, Vec3Double, Vec4Double,     // dvec
 	Mat2, Mat3, Mat4,                               // mat
-	DoubleMat2, DoubleMat3, DoubleMat4, // dmat
+	MatDouble2, MatDouble3, MatDouble4,             // dmat
 };
 // clang-format on
 
 // -----------------------------------------
 
 // Describes one element of the BufferLayout
-class BufferElement {
+class BufferElement final {
 public:
 	BufferElement(BufferElementType type, std::string name, bool normalized = false);
+	~BufferElement() = default;
 
 	uint32_t getTypeSize() const;
 	uint32_t getTypeCount() const;
 	uint32_t getTypeGL() const;
-	static uint32_t getTypeSize(const BufferElementType type);
-	static uint32_t getTypeCount(const BufferElementType type);
-	static uint32_t getTypeGL(const BufferElementType type);
+	static uint32_t getTypeSize(BufferElementType type);
+	static uint32_t getTypeCount(BufferElementType type);
+	static uint32_t getTypeGL(BufferElementType type);
+	static uint32_t getGLTypeSize(uint32_t type);
 
-	BufferElementType getType() const { return m_type; }
-	std::string getName() const { return m_name; }
-	uint32_t getSize() const { return m_size; }
-	uint32_t getOffset() const { return m_offset; }
-	bool getNormalized() const { return m_normalized; }
+	BufferElementType type() const { return m_type; }
+	std::string name() const { return m_name; }
+	uint32_t size() const { return m_size; }
+	uint32_t offset() const { return m_offset; }
+	bool normalized() const { return m_normalized; }
 
-	void setType(const BufferElementType& type) { m_type = type; }
+	void setType(BufferElementType type) { m_type = type; }
 	void setName(const std::string& name) { m_name = name; }
-	void setSize(const uint32_t& size) { m_size = size; }
-	void setOffset(const uint32_t& offset) { m_offset = offset; }
-	void setNormalized(const bool& normalized) { m_normalized = normalized; }
+	void setSize(uint32_t size) { m_size = size; }
+	void setOffset(uint32_t offset) { m_offset = offset; }
+	void setNormalized(bool normalized) { m_normalized = normalized; }
 
 private:
 	BufferElementType m_type;
@@ -65,13 +67,14 @@ private:
 // -----------------------------------------
 
 // Layout that describes raw vertex data
-class BufferLayout {
+class BufferLayout final {
 public:
 	BufferLayout() {}
 	BufferLayout(const std::initializer_list<BufferElement>& elements);
+	~BufferLayout() = default;
 
-	const std::vector<BufferElement>& getElements() const { return m_elements; }
-	uint32_t getStride() const { return m_stride; }
+	const std::vector<BufferElement>& elements() const { return m_elements; }
+	uint32_t stride() const { return m_stride; }
 
 	// Iterators
 	std::vector<BufferElement>::iterator begin() { return m_elements.begin(); }
@@ -90,10 +93,10 @@ private:
 // -----------------------------------------
 
 // GPU memory which holds raw vertex data
-class VertexBuffer { // Vertex Buffer Object, VBO
+class VertexBuffer final { // Vertex Buffer Object, VBO
 public:
 	VertexBuffer(size_t size);
-	VertexBuffer(float* vertices, size_t size);
+	VertexBuffer(size_t size, float* vertices);
 	~VertexBuffer();
 
 	void bind() const;
@@ -101,9 +104,9 @@ public:
 
 	void uploadData(const void* data, uint32_t size);
 
-	const BufferLayout& getLayout() const { return m_layout; }
+	const BufferLayout& layout() const { return m_layout; }
 
-	inline void setLayout(const BufferLayout& layout) { m_layout = layout; }
+	void setLayout(const BufferLayout& layout) { m_layout = layout; }
 
 private:
 	uint32_t m_id { 0 };
@@ -113,7 +116,7 @@ private:
 // -----------------------------------------
 
 // Vertices order of rendering
-class IndexBuffer { // Element Buffer Object, EBO
+class IndexBuffer final { // Element Buffer Object, EBO
 public:
 	IndexBuffer(uint32_t* indices, size_t size);
 	~IndexBuffer();
@@ -123,7 +126,7 @@ public:
 
 	void uploadData(const void* data, uint32_t size);
 
-	uint32_t getCount() const { return m_count; }
+	uint32_t count() const { return m_count; }
 
 private:
 	uint32_t m_id { 0 };
@@ -133,7 +136,7 @@ private:
 // -----------------------------------------
 
 // Array that holds the vertex attributes configuration
-class VertexArray { // Vertex Array Object, VAO
+class VertexArray final { // Vertex Array Object, VAO
 public:
 	VertexArray();
 	~VertexArray();
@@ -145,7 +148,7 @@ public:
 	void setIndexBuffer(std::shared_ptr<IndexBuffer> indexBuffer);
 
 	std::shared_ptr<VertexBuffer> at(size_t i) const { return m_vertexBuffers.at(i); }
-	std::shared_ptr<IndexBuffer> getIndexBuffer() const { return m_indexBuffer; }
+	std::shared_ptr<IndexBuffer> indexBuffer() const { return m_indexBuffer; }
 
 private:
 	uint32_t m_id { 0 };

src/inferno/render/framebuffer.cpp

@@ -1,21 +1,159 @@
 /*
- * Copyright (C) 2022 Riyyi
+ * Copyright (C) 2022,2024 Riyyi
  *
  * SPDX-License-Identifier: MIT
  */
 
+#include <cstddef> // size_t
+#include <cstdint> // uint8_t, uint32_t
+
+#include "glad/glad.h"
+#include "ruc/meta/assert.h"
+
+#include "inferno/asset/texture.h"
 #include "inferno/render/framebuffer.h"
 
 namespace Inferno {
 
-Framebuffer::Framebuffer()
+std::shared_ptr<Framebuffer> Framebuffer::create(const Properties& properties)
 {
+	VERIFY((properties.attachments.size() > 0 && !properties.renderToScreen) || properties.renderToScreen,
+	       "cant have attachments on the default framebuffer");
+
+	auto result = std::shared_ptr<Framebuffer>(new Framebuffer(properties));
+
+	result->createTextures();
+
+	return result;
 }
 
 Framebuffer::~Framebuffer()
 {
+	if (m_renderToScreen) {
+		return;
+	}
+
+	glDeleteFramebuffers(1, &m_id);
+}
+
+void Framebuffer::copyBuffer(std::shared_ptr<Framebuffer> from, std::shared_ptr<Framebuffer> to, uint32_t bits, uint32_t filter)
+{
+	glBindFramebuffer(GL_READ_FRAMEBUFFER, from->m_id);
+	glBindFramebuffer(GL_DRAW_FRAMEBUFFER, 0); // write to default framebuffer
+	glBlitFramebuffer(0, 0, from->m_width, from->m_height, 0, 0, to->m_width, to->m_height, bits, filter);
+	glBindFramebuffer(GL_FRAMEBUFFER, 0);
 }
 
 // -----------------------------------------
 
+void Framebuffer::bind() const
+{
+	glBindFramebuffer(GL_FRAMEBUFFER, m_id);
+}
+
+void Framebuffer::unbind() const
+{
+	glBindFramebuffer(GL_FRAMEBUFFER, 0);
+}
+
+bool Framebuffer::check() const
+{
+	VERIFY(glCheckFramebufferStatus(GL_FRAMEBUFFER) == GL_FRAMEBUFFER_COMPLETE,
+	       "malformed framebuffer: {:#x}", glCheckFramebufferStatus(GL_FRAMEBUFFER));
+	return true;
+}
+
+void Framebuffer::resize(uint32_t width, uint32_t height)
+{
+	if (m_width == width && m_height == height) {
+		return;
+	}
+
+	m_width = width;
+	m_height = height;
+
+	createTextures();
+}
+
+// -----------------------------------------
+
+void Framebuffer::createTextures()
+{
+	if (m_renderToScreen) {
+		return;
+	}
+
+	if (m_id) {
+		glDeleteFramebuffers(1, &m_id);
+		m_textures.clear();
+	}
+
+	m_id = UINT_MAX;
+	glGenFramebuffers(1, &m_id);
+
+	bind();
+
+	auto it = m_attachments.begin();
+	m_colorAttachmentCount = 0;
+
+	size_t size = m_attachments.size();
+	m_textures.resize(size);
+	for (size_t i = 0; i < size; ++i) {
+		TypeProperties type = *(it + i);
+
+		if (type.type == Type::RGB8) {
+			// Set color attachment 0 out of 32
+			m_textures[i] = TextureFramebuffer::create("", m_width, m_height, GL_RGB8, GL_RGB);
+			glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0 + m_colorAttachmentCount, GL_TEXTURE_2D, m_textures[i]->id(), 0);
+			m_colorAttachmentCount++;
+			continue;
+		}
+
+		if (type.type == Type::RGBA8) { // Color
+			// Set color attachment 0 out of 32
+			m_textures[i] = TextureFramebuffer::create("", m_width, m_height, GL_RGBA8, GL_RGBA);
+			glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0 + m_colorAttachmentCount, GL_TEXTURE_2D, m_textures[i]->id(), 0);
+			m_colorAttachmentCount++;
+			continue;
+		}
+
+		if (type.type == Type::RGBA16F) {
+			// Set color attachment 0 out of 32
+			m_textures[i] = TextureFramebuffer::create("", m_width, m_height, GL_RGBA16F, GL_RGBA, GL_FLOAT);
+			glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0 + m_colorAttachmentCount, GL_TEXTURE_2D, m_textures[i]->id(), 0);
+			m_colorAttachmentCount++;
+			continue;
+		}
+
+		if (type.type == Type::RGBA32F) {
+			// Set color attachment 0 out of 32
+			m_textures[i] = TextureFramebuffer::create("", m_width, m_height, GL_RGBA32F, GL_RGBA, GL_FLOAT);
+			glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0 + m_colorAttachmentCount, GL_TEXTURE_2D, m_textures[i]->id(), 0);
+			m_colorAttachmentCount++;
+			continue;
+		}
+
+		// This combined texture is required for older GPUs
+		if (type.type == Type::Depth24Stencil8) { // Depth
+			m_textures[i] = (TextureFramebuffer::create(
+				"", m_width, m_height, GL_DEPTH24_STENCIL8, GL_DEPTH_STENCIL, GL_UNSIGNED_INT_24_8));
+			glFramebufferTexture2D(GL_FRAMEBUFFER, GL_DEPTH_STENCIL_ATTACHMENT, GL_TEXTURE_2D, m_textures[i]->id(), 0);
+			continue;
+		}
+
+		if (type.type == Type::Depth32F) {
+			//  FIXME: This isnt a 32-bit float texture
+			m_textures[i] = (TextureFramebuffer::create(
+				"", m_width, m_height, GL_DEPTH_COMPONENT, GL_DEPTH_COMPONENT));
+			glFramebufferTexture2D(GL_FRAMEBUFFER, GL_DEPTH_ATTACHMENT, GL_TEXTURE_2D, m_textures[i]->id(), 0);
+			continue;
+		}
+	}
+
+	VERIFY(m_colorAttachmentCount <= 32, "maximum color attachments was exceeded: {}/32", m_colorAttachmentCount);
+	check();
+
+	unbind();
+}
+
 } // namespace Inferno

src/inferno/render/framebuffer.h

@@ -1,17 +1,105 @@
 /*
- * Copyright (C) 2022 Riyyi
+ * Copyright (C) 2022,2024 Riyyi
  *
  * SPDX-License-Identifier: MIT
  */
 
 #pragma once
 
+#include <cstddef> // size_t
+#include <cstdint> // uint8_t
+#include <initializer_list>
+#include <memory> // std::shared_ptr
+#include <vector>
+
+#include "glm/ext/vector_float4.hpp" // glm::vec4
+
+#include "inferno/asset/texture.h"
+
 namespace Inferno {
 
-class Framebuffer {
+class Framebuffer final { // Frame Buffer Object, FBO
 public:
-	Framebuffer();
-	virtual ~Framebuffer();
+	enum Type : uint8_t {
+		None = 0,
+
+		// Color
+		RGB8 = 1,
+		RGBA8 = 2,
+		RGBA16F = 3,
+		RGBA32F = 4,
+
+		// Depth/stencil
+		Depth24Stencil8 = 5,
+		Depth32F = 6,
+
+		// Defaults
+		Color = RGBA8,
+		Depth = Depth24Stencil8,
+	};
+
+	struct TypeProperties {
+		TypeProperties() = default;
+		TypeProperties(Type type)
+			: type(type)
+		{
+		}
+
+		Type type;
+	};
+
+	struct Properties {
+		std::initializer_list<TypeProperties> attachments {};
+		bool renderToScreen { false }; // (dummy framebuffer)
+
+		uint32_t width { 1280 };
+		uint32_t height { 720 };
+		glm::vec4 clearColor { 1.0f, 0.0f, 1.0f, 1.0f }; // magenta
+		uint32_t clearBit { 0 };
+	};
+
+	~Framebuffer();
+
+	// Factory function
+	static std::shared_ptr<Framebuffer> create(const Properties& properties);
+	static void copyBuffer(std::shared_ptr<Framebuffer> from, std::shared_ptr<Framebuffer> to, uint32_t bits, uint32_t filter);
+
+	void bind() const;
+	void unbind() const;
+	bool check() const;
+	void resize(uint32_t width, uint32_t height);
+
+	uint8_t colorAttachmentCount() const { return m_colorAttachmentCount; }
+	uint32_t id() const { return m_id; }
+	uint32_t width() const { return m_width; }
+	uint32_t height() const { return m_height; }
+	uint32_t clearBit() const { return m_clearBit; }
+	glm::vec4 clearColor() const { return m_clearColor; }
+	const std::vector<TypeProperties>& attachments() const { return m_attachments; }
+	std::shared_ptr<TextureFramebuffer> texture(size_t index) const { return m_textures[index]; }
+
+private:
+	Framebuffer(const Properties& properties)
+		: m_renderToScreen(properties.renderToScreen)
+		, m_width(properties.width)
+		, m_height(properties.height)
+		, m_clearBit(properties.clearBit)
+		, m_clearColor(properties.clearColor)
+		, m_attachments(properties.attachments)
+	{
+	}
+	void createTextures();
+
+private:
+	bool m_renderToScreen { false };
+	uint8_t m_colorAttachmentCount { 1 };
+	uint32_t m_id { 0 };
+	uint32_t m_width { 0 };
+	uint32_t m_height { 0 };
+	uint32_t m_clearBit { 0 };
+	glm::vec4 m_clearColor;
+	std::vector<TypeProperties> m_attachments;
+	std::vector<std::shared_ptr<TextureFramebuffer>> m_textures;
 };
 
 } // namespace Inferno

src/inferno/render/gltf.cpp

@@ -1,347 +0,0 @@
-/*
- * Copyright (C) 2022 Riyyi
- *
- * SPDX-License-Identifier: MIT
- */
-
-#if 0
-	#include <algorithm> // std::copy
-	#include <utility>   // std::move
-
-	#include "nlohmann/json.hpp"
-	#include "ruc/meta/assert.h"
-
-	#include "inferno/io/file.h"
-	#include "inferno/io/gltffile.h"
-	#include "inferno/io/log.h"
-	#include "inferno/render/gltf.h"
-	#include "inferno/util/integer.h"
-
-namespace Inferno {
-
-	Gltf::Gltf(const std::string& path)
-		: m_path(std::move(path))
-	{
-		auto gltf = GltfFile::read(path);
-		VERIFY(gltf.first, "Gltf model invalid JSON content '{}'", path);
-
-		json json = json::parse(gltf.first.get());
-
-		// Add binary data from .glb files
-		if (gltf.second) {
-			m_model.data.emplace(0, std::move(gltf.second));
-		}
-
-		// Properties
-
-		// Asset
-		// ---------------------------------
-
-		VERIFY(Json::hasProperty(json, "asset"), "GlTF model missing required property 'asset'");
-		auto asset = json["asset"];
-		VERIFY(asset.is_object(), "Gltf model invalid property type 'asset'");
-
-		parseAsset(&m_model.asset, asset);
-
-		// Scene
-		// ---------------------------------
-
-		if (Json::hasProperty(json, "scenes")) {
-
-			auto scenes = json["scenes"];
-			VERIFY(scenes.is_array(), "Gltf model invalid property type 'scenes'");
-
-			for (auto& [key, object] : scenes.items()) {
-				glTF::Scene scene;
-				parseScene(&scene, key, object);
-				m_model.scenes.emplace_back(std::move(scene));
-			}
-		}
-
-		// Node
-		// ---------------------------------
-
-		if (Json::hasProperty(json, "nodes")) {
-
-			auto nodes = json["nodes"];
-			VERIFY(nodes.is_array(), "Gltf model invalid property type 'nodes'");
-
-			for (auto& [key, object] : nodes.items()) {
-				glTF::Node node;
-				parseNode(&node, key, object);
-				m_model.nodes.emplace_back(std::move(node));
-			}
-		}
-
-		// Mesh
-		// ---------------------------------
-
-		if (Json::hasProperty(json, "meshes")) {
-
-			auto meshes = json["meshes"];
-			VERIFY(meshes.is_array(), "Gltf model invalid property type 'meshes'");
-
-			for (auto& [key, object] : meshes.items()) {
-				glTF::Mesh mesh;
-				parseMesh(&mesh, key, object);
-				m_model.meshes.emplace_back(std::move(mesh));
-			}
-		}
-
-		// Accessor
-		// ---------------------------------
-
-		if (Json::hasProperty(json, "accessors")) {
-
-			auto accessors = json["accessors"];
-			VERIFY(accessors.is_array(), "Gltf model invalid property type 'accessors'");
-
-			for (auto& [key, object] : accessors.items()) {
-				glTF::Accessor accessor;
-				parseAccessor(&accessor, key, object);
-				m_model.accessors.emplace_back(std::move(accessor));
-			}
-		}
-
-		// Bufferview
-		// ---------------------------------
-
-		if (Json::hasProperty(json, "bufferViews")) {
-
-			auto bufferViews = json["bufferViews"];
-			VERIFY(bufferViews.is_array(), "Gltf model invalid property type 'bufferViews'");
-
-			for (auto& [key, object] : bufferViews.items()) {
-				glTF::BufferView bufferView;
-				parseBufferView(&bufferView, key, object);
-				m_model.bufferViews.emplace_back(std::move(bufferView));
-			}
-		}
-
-		// Buffer
-		// ---------------------------------
-
-		if (Json::hasProperty(json, "buffers")) {
-
-			auto buffers = json["buffers"];
-			VERIFY(buffers.is_array(), "Gltf model invalid property type 'buffers'");
-
-			for (auto& [key, object] : buffers.items()) {
-				glTF::Buffer buffer;
-				parseBuffer(&buffer, key, object, &m_model.data);
-				m_model.buffers.emplace_back(std::move(buffer));
-			}
-		}
-
-	}
-
-	Gltf::~Gltf()
-	{
-	}
-
-	void Gltf::parseAsset(glTF::Asset* asset, const json& object)
-	{
-		auto copyright = Json::parseStringProperty(object, "copyright", false);
-
-		auto generator = Json::parseStringProperty(object, "generator", false);
-
-		auto version = Json::parseStringProperty(object, "version", true);
-		VERIFY(version, "GlTF model missing required property 'version'");
-		VERIFY(version.value().compare("2.0") == 0, "GlTF version unsupported '{}'", version.value());
-
-		auto minVersion = Json::parseStringProperty(object, "minVersion", false);
-
-		if (copyright)  asset->copyright = copyright.value();
-		if (generator)  asset->generator = generator.value();
-		if (version)    asset->version = version.value();
-		if (minVersion) asset->minVersion = minVersion.value();
-	}
-
-	void Gltf::parseScene(glTF::Scene* scene, const std::string& key, const json& object)
-	{
-		auto nodes = Json::parseFloatArrayProperty(object, "nodes", false);
-		VERIFY(!nodes || nodes.value().size() > 0, "Gltf scene '{}' empty 'nodes' property", key);
-
-		auto name = Json::parseStringProperty(object, "name", false);
-
-		scene->name = name ? name.value() : key;
-	}
-
-	void Gltf::parseNode(glTF::Node* node, const std::string& key, const json& object)
-	{
-		auto camera = Json::parseUnsignedProperty(object, "camera", false);
-
-		auto children = Json::parseUnsignedArrayProperty(object, "children", false);
-		VERIFY(!children || children.value().size() > 0, "Gltf node '{}' empty property 'children'", key);
-
-		auto skin = Json::parseUnsignedProperty(object, "skin", false);
-
-		auto matrix = Json::parseFloatArrayProperty(object, "matrix", false);
-		VERIFY(!matrix || matrix.value().size() == 16, "Gltf node '{}' property 'matrix' invalid size", key);
-
-		auto mesh = Json::parseUnsignedProperty(object, "mesh", false);
-
-		auto rotation = Json::parseFloatArrayProperty(object, "rotation", false);
-		VERIFY(!rotation || rotation.value().size() == 4, "Gltf node '{}' property 'rotation' invalid size", key);
-
-		auto scale = Json::parseFloatArrayProperty(object, "scale", false);
-		VERIFY(!scale || scale.value().size() == 3, "Gltf node '{}' property 'scale' invalid size", key);
-
-		auto translation = Json::parseFloatArrayProperty(object, "translation", false);
-		VERIFY(!translation || translation.value().size() == 3, "Gltf node '{}' property 'translation' invalid size", key);
-
-		auto weights = Json::parseFloatArrayProperty(object, "weights", false);
-		VERIFY(!weights || weights.value().size() > 0, "Gltf node '{}' empty property 'weights'", key);
-
-		auto name = Json::parseStringProperty(object, "name", false);
-
-		if (camera)      node->camera = camera.value();
-		if (children)    node->children = children.value();
-		if (skin)        node->skin = skin.value();
-		if (matrix)      std::copy(matrix.value().begin(), matrix.value().end(), node->matrix.begin());
-		if (mesh)        node->mesh = mesh.value();
-		if (rotation)    std::copy(rotation.value().begin(), rotation.value().end(), node->rotation.begin());
-		if (scale)       std::copy(scale.value().begin(), scale.value().end(), node->scale.begin());
-		if (translation) std::copy(translation.value().begin(), translation.value().end(), node->translation.begin());
-		if (weights)     node->weights = weights.value();
-		node->name = name ? name.value() : key;
-	}
-
-	void Gltf::parsePrimitive(glTF::Primitive* primitive, const std::string& key, const json& object)
-	{
-		auto attributes = Json::parseUnsignedObjectProperty(object, "attributes", true);
-		VERIFY(attributes && attributes.value().size() > 0, "Gltf primitive '{}' empty property 'attributes'", key);
-
-		auto indices = Json::parseUnsignedProperty(object, "indices", false);
-
-		auto material = Json::parseUnsignedProperty(object, "material", false);
-
-		auto mode = Json::parseUnsignedProperty(object, "mode", false);
-
-		if (Json::hasProperty(object, "targets")) {
-
-			auto targets = object["targets"];
-			VERIFY(targets.is_array(), "Gltf primitive '{}' property 'targets' invalid type", key);
-
-			for (auto& targetObject : targets) {
-
-				std::map<std::string, uint32_t> target;
-
-				for (auto& [key, propertyValue] : targetObject.items()) {
-					auto value = Json::getPropertyValue<uint32_t>(propertyValue, json::value_t::number_unsigned);
-					if (value) target.emplace(std::move(key), value.value());
-				}
-
-				VERIFY(target.size() > 0, "Gltf primitive '{}' empty 'target' object", key);
-				primitive->targets.emplace_back(std::move(target));
-			}
-		}
-
-		if (attributes) primitive->attributes = attributes.value();
-		if (indices)    primitive->indices = indices.value();
-		if (material)   primitive->material = material.value();
-		if (mode)       primitive->mode = static_cast<unsigned char>(mode.value());
-	}
-
-	void Gltf::parseMesh(glTF::Mesh* mesh, const std::string& key, const json& object)
-	{
-		VERIFY(Json::hasProperty(object, "primitives"), "Gltf mesh '{}' missing required property 'primitives'", key);
-		auto primitives = object["primitives"];
-		VERIFY(primitives.is_array(), "Gltf mesh '{}' property 'primitives' invalid type", key);
-
-		for (auto& primitiveObject : primitives) {
-			glTF::Primitive primitive;
-			parsePrimitive(&primitive, key, primitiveObject);
-			mesh->primitives.emplace_back(std::move(primitive));
-		}
-
-		auto weights = Json::parseFloatArrayProperty(object, "weights", false);
-		VERIFY(!weights || weights.value().size() > 0, "Gltf mesh '{}' empty property 'weights'", key);
-
-		auto name = Json::parseStringProperty(object, "name", false);
-
-		if (weights) mesh->weights = weights.value();
-		mesh->name = name ? name.value() : key;
-	}
-
-	void Gltf::parseAccessor(glTF::Accessor* accessor, const std::string& key, const json& object)
-	{
-		auto bufferView = Json::parseUnsignedProperty(object, "bufferView", false);
-
-		auto byteOffset = Json::parseUnsignedProperty(object, "byteOffset", false);
-
-		auto componentType = Json::parseUnsignedProperty(object, "componentType", true);
-		VERIFY(componentType, "Gltf accessor '{}' missing required property 'componentType'", key);
-
-		auto normalized = Json::parseBoolProperty(object, "normalized", false);
-
-		auto count = Json::parseUnsignedProperty(object, "count", true);
-		VERIFY(count, "Gltf accessor '{}' missing required property 'count'", key);
-
-		auto type = Json::parseStringProperty(object, "type", true);
-		VERIFY(type, "Gltf accessor '{}' missing required property 'type'", key);
-
-		auto max = Json::parseFloatArrayProperty(object, "max", false);
-		VERIFY(!max || max.value().size() > 0, "Gltf accessor '{}' empty property 'max'", key);
-
-		auto min = Json::parseFloatArrayProperty(object, "min", false);
-		VERIFY(!min || min.value().size() > 0, "Gltf accessor '{}' empty property 'min'", key);
-
-		auto name = Json::parseStringProperty(object, "name", false);
-
-		if (bufferView) accessor->bufferView = bufferView.value();
-		if (byteOffset) accessor->byteOffset = byteOffset.value();
-		if (normalized) accessor->normalized = normalized.value();
-		if (count)      accessor->count = count.value();
-		if (type)       accessor->type = type.value();
-		if (max)        accessor->max = max.value();
-		if (min)        accessor->min = min.value();
-		accessor->name = name ? name.value() : key;
-	}
-
-	void Gltf::parseBufferView(glTF::BufferView* bufferView, const std::string& key, const json& object)
-	{
-		auto buffer = Json::parseUnsignedProperty(object, "buffer", false);
-		VERIFY(buffer, "Gltf bufferView '{}' missing required property 'buffer'", key);
-
-		auto byteOffset = Json::parseUnsignedProperty(object, "byteOffset", false);
-
-		auto byteLength = Json::parseUnsignedProperty(object, "byteLength", true);
-		VERIFY(byteLength, "Gltf bufferView '{}' missing required property 'byteLength'", key);
-
-		auto byteStride = Json::parseUnsignedProperty(object, "byteStride", false);
-
-		auto target = Json::parseUnsignedProperty(object, "target", false);
-
-		auto name = Json::parseStringProperty(object, "name", false);
-
-		if (buffer)     bufferView->buffer = buffer.value();
-		if (byteOffset) bufferView->byteOffset = byteOffset.value();
-		if (byteLength) bufferView->byteLength = byteLength.value();
-		if (byteStride) bufferView->byteStride = byteStride.value();
-		if (target)     bufferView->target = target.value();
-		bufferView->name = name ? name.value() : key;
-	}
-
-	void Gltf::parseBuffer(glTF::Buffer* buffer, const std::string& key, const json& object, std::map<uint32_t, std::shared_ptr<char[]>>* data)
-	{
-		auto uri = Json::parseStringProperty(object, "uri", false);
-
-		// Load external binary data
-		if (uri) {
-			VERIFY(uri.value().find("data:", 0) == std::string::npos, "GltfFile embedded binary data is unsupported");
-			data->emplace(std::stou(key), File::raw("assets/gltf/" + uri.value()));
-		}
-
-		auto byteLength = Json::parseUnsignedProperty(object, "byteLength", true);
-		VERIFY(byteLength, "Gltf buffer '{}' missing required property 'byteLength'", key);
-
-		auto name = Json::parseStringProperty(object, "name", false);
-
-		if (uri)        buffer->uri = uri.value();
-		if (byteLength) buffer->byteLength = byteLength.value();
-		buffer->name = name ? name.value() : key;
-	}
-
-} // namespace Inferno
-#endif

src/inferno/render/gltf.h

@@ -1,176 +0,0 @@
-/*
- * Copyright (C) 2022 Riyyi
- *
- * SPDX-License-Identifier: MIT
- */
-
-#pragma once
-
-#if 0
-	#include <cstdint>       // uint32_t
-	#include <memory>        // std::shared_ptr
-	#include <string>        // std::string
-	#include <unordered_map> // std::unordered_map
-	#include <vector>        // std::vector
-
-	#include "ruc/singleton.h"
-
-	#include "inferno/util/json.h"
-
-	#define GLTF_TYPE_SCALAR 1
-	#define GLTF_TYPE_VEC2 2
-	#define GLTF_TYPE_VEC3 3
-	#define GLTF_TYPE_VEC4 4
-	#define GLTF_TYPE_MAT2 8
-	#define GLTF_TYPE_MAT3 12
-	#define GLTF_TYPE_MAT4 16
-
-	#define GLTF_COMPONENT_TYPE_BYTE 5120
-	#define GLTF_COMPONENT_TYPE_UNSIGNED_BYTE 5121
-	#define GLTF_COMPONENT_TYPE_SHORT 5122
-	#define GLTF_COMPONENT_TYPE_UNSIGNED_SHORT 5123
-	#define GLTF_COMPONENT_TYPE_INT 5124
-	#define GLTF_COMPONENT_TYPE_UNSIGNED_INT 5125
-	#define GLTF_COMPONENT_TYPE_FLOAT 5126
-
-	#define GLTF_TARGET_ARRAY_BUFFER 34962
-	#define GLTF_TARGET_ELEMENT_ARRAY_BUFFER 34963
-
-namespace Inferno {
-
-	namespace glTF {
-
-		// Type specifications
-		// https://github.com/KhronosGroup/glTF/tree/master/specification/2.0#objects
-
-		// https://github.com/KhronosGroup/glTF/tree/master/specification/2.0#asset
-		struct Asset {
-			std::string copyright;
-			std::string generator;
-			std::string version; // Required
-			std::string minVersion;
-		};
-
-		// https://github.com/KhronosGroup/glTF/tree/master/specification/2.0#scenes
-		struct Scene {
-			std::vector<uint32_t> nodes;
-			std::string name;
-		};
-
-		// https://github.com/KhronosGroup/glTF/tree/master/specification/2.0#nodes-and-hierarchy
-		struct Node {
-			uint32_t camera;
-			std::vector<uint32_t> children;
-			uint32_t skin;
-			std::array<float, 16> matrix { 1, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1 }; // Identity matrix
-			uint32_t mesh;
-			std::array<float, 4> rotation { 0, 0, 0, 1 };
-			std::array<float, 3> scale { 1, 1, 1 };
-			std::array<float, 3> translation { 0, 0, 0 };
-			std::vector<float> weights;
-			std::string name;
-		};
-
-		struct Primitive {
-			std::map<std::string, uint32_t> attributes; // Required
-			uint32_t indices;
-			uint32_t material;
-			unsigned char mode { 4 };
-			std::vector<std::map<std::string, uint32_t>> targets;
-		};
-
-		// https://github.com/KhronosGroup/glTF/tree/master/specification/2.0#meshes
-		struct Mesh {
-			std::vector<Primitive> primitives; // Required
-			std::vector<float> weights;
-			std::string name;
-		};
-
-		// https://github.com/KhronosGroup/glTF/tree/master/specification/2.0#accessors
-		struct Accessor {
-			uint32_t bufferView;
-			uint32_t byteOffset { 0 };
-			uint32_t componentType;    // Required
-			bool normalized { false };
-			uint32_t count;            // Required
-			std::string type;          // Required
-			std::vector<float> max;
-			std::vector<float> min;
-			std::string name;
-		};
-
-		// https://github.com/KhronosGroup/glTF/tree/master/specification/2.0#buffers-and-buffer-views
-		struct BufferView {
-			uint32_t buffer;           // Required
-			uint32_t byteOffset { 0 };
-			uint32_t byteLength;       // Required
-			uint32_t byteStride;
-			uint32_t target;
-			std::string name;
-		};
-
-		struct Buffer {
-			std::string uri;
-			uint32_t byteLength; // Required
-			std::string name;
-		};
-
-		struct Model {
-			Asset asset;
-
-			std::vector<Scene> scenes;
-			std::vector<Node> nodes;
-			std::vector<Mesh> meshes;
-			std::vector<Accessor> accessors;
-			std::vector<BufferView> bufferViews;
-			std::vector<Buffer> buffers;
-
-			std::map<uint32_t, std::shared_ptr<char[]>> data;
-		};
-
-	} // namespace glTF
-
-// -----------------------------------------
-
-	class Gltf {
-	public:
-		Gltf(const std::string& path);
-		virtual ~Gltf();
-
-		inline const glTF::Model& model() const { return m_model; }
-
-	private:
-		static void parseAsset(glTF::Asset* asset, const json& object);
-		static void parseScene(glTF::Scene* scene, const std::string& key, const json& object);
-		static void parseNode(glTF::Node* node, const std::string& key, const json& object);
-		static void parsePrimitive(glTF::Primitive* primitive, const std::string& key, const json& object);
-		static void parseMesh(glTF::Mesh* mesh, const std::string& key, const json& object);
-		static void parseAccessor(glTF::Accessor* accessor, const std::string& key, const json& object);
-		static void parseBufferView(glTF::BufferView* bufferView, const std::string& key, const json& object);
-		static void parseBuffer(glTF::Buffer* buffer, const std::string& key, const json& object, std::map<uint32_t, std::shared_ptr<char[]>>* data);
-
-		std::string m_path;
-		glTF::Model m_model;
-	};
-
-// -----------------------------------------
-
-	class GltfManager final : ruc::Singleton<GltfManager> {
-	public:
-		GltfManager(s) {}
-		virtual ~GltfManager() {}
-
-		void add(const std::string& path, std::shared_ptr<Gltf> gltf);
-		std::shared_ptr<Gltf> load(const std::string& path);
-		std::shared_ptr<Gltf> get(const std::string& path);
-		bool exists(const std::string& path);
-
-		void remove(const std::string& path);
-		void remove(std::shared_ptr<Gltf> gltf);
-
-	private:
-		std::unordered_map<std::string, std::shared_ptr<Gltf>> m_gltfList;
-	};
-
-} // namespace Inferno
-#endif

src/inferno/render/render-command.cpp

@@ -4,10 +4,12 @@
  * SPDX-License-Identifier: MIT
  */
 
-#include <memory> // std::shadred_ptr
+#include <cstdint> // int32_t, uint32_t
+#include <memory>  // std::shared_ptr
 
 #include "glad/glad.h"
 #include "ruc/format/log.h"
+#include "ruc/meta/assert.h"
 
 #include "inferno/render/buffer.h"
 #include "inferno/render/render-command.h"
@@ -29,9 +31,10 @@ void RenderCommand::destroy()
 {
 }
 
-void RenderCommand::clear()
+void RenderCommand::clearBit(uint32_t bits)
 {
-	glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
+	// GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT | GL_STENCIL_BUFFER_BIT
+	glClear(bits);
 }
 
 void RenderCommand::clearColor(const glm::vec4& color)
@@ -41,7 +44,7 @@ void RenderCommand::clearColor(const glm::vec4& color)
 
 void RenderCommand::drawIndexed(std::shared_ptr<VertexArray> vertexArray, uint32_t indexCount)
 {
-	uint32_t count = indexCount ? indexCount : vertexArray->getIndexBuffer()->getCount();
+	uint32_t count = indexCount ? indexCount : vertexArray->indexBuffer()->count();
 	glDrawElements(GL_TRIANGLES, count, GL_UNSIGNED_INT, nullptr);
 }
 
@@ -56,6 +59,26 @@ void RenderCommand::setDepthTest(bool enabled)
 	enabled ? glEnable(GL_DEPTH_TEST) : glDisable(GL_DEPTH_TEST);
 }
 
+void RenderCommand::setColorAttachmentCount(uint32_t count)
+{
+	static constexpr uint32_t colorAttachments[] = {
+		GL_COLOR_ATTACHMENT0, GL_COLOR_ATTACHMENT1, GL_COLOR_ATTACHMENT2,
+		GL_COLOR_ATTACHMENT3, GL_COLOR_ATTACHMENT4, GL_COLOR_ATTACHMENT5,
+		GL_COLOR_ATTACHMENT6, GL_COLOR_ATTACHMENT7, GL_COLOR_ATTACHMENT8,
+		GL_COLOR_ATTACHMENT9, GL_COLOR_ATTACHMENT10, GL_COLOR_ATTACHMENT11,
+		GL_COLOR_ATTACHMENT12, GL_COLOR_ATTACHMENT13, GL_COLOR_ATTACHMENT14,
+		GL_COLOR_ATTACHMENT15, GL_COLOR_ATTACHMENT16, GL_COLOR_ATTACHMENT17,
+		GL_COLOR_ATTACHMENT18, GL_COLOR_ATTACHMENT19, GL_COLOR_ATTACHMENT20,
+		GL_COLOR_ATTACHMENT21, GL_COLOR_ATTACHMENT22, GL_COLOR_ATTACHMENT23,
+		GL_COLOR_ATTACHMENT24, GL_COLOR_ATTACHMENT25, GL_COLOR_ATTACHMENT26,
+		GL_COLOR_ATTACHMENT27, GL_COLOR_ATTACHMENT28, GL_COLOR_ATTACHMENT29,
+		GL_COLOR_ATTACHMENT30, GL_COLOR_ATTACHMENT31
+	};
+	static constexpr uint32_t maxCount = sizeof(colorAttachments) / sizeof(colorAttachments[0]);
+	VERIFY(count > 0 && count <= maxCount, "incorrect colorbuffer count: {}/{}", count, maxCount);
+	glDrawBuffers(static_cast<int32_t>(count), colorAttachments); // Multiple Render Targets (MRT)
+}
+
 bool RenderCommand::depthTest()
 {
 	unsigned char depthTest = GL_FALSE;

src/inferno/render/render-command.h

@@ -6,6 +6,7 @@
 
 #pragma once
 
+#include <cstdint> // int32_t, uint32_t
 #include <memory>  // std::shadred_ptr
 
 #include "glm/ext/vector_float4.hpp" // glm::vec4
@@ -19,12 +20,13 @@ public:
 	static void initialize();
 	static void destroy();
 
-	static void clear();
+	static void clearBit(uint32_t bits);
 	static void clearColor(const glm::vec4& color);
 	static void drawIndexed(std::shared_ptr<VertexArray> vertexArray, uint32_t indexCount = 0);
 
 	static void setViewport(int32_t x, int32_t y, uint32_t width, uint32_t height);
 	static void setDepthTest(bool enabled);
+	static void setColorAttachmentCount(uint32_t count);
 
 	static bool depthTest();
 	static int32_t textureUnitAmount();

src/inferno/render/renderer.cpp

@@ -8,6 +8,7 @@
 #include <span>
 
 #include "glad/glad.h"
+#include "glm/ext/vector_float4.hpp" // glm::vec4
 #include "ruc/format/log.h"
 
 #include "inferno/asset/asset-manager.h"
@@ -33,9 +34,6 @@ void Renderer<T>::endScene()
 
 // -----------------------------------------
 
-template<typename T>
-uint32_t Renderer<T>::m_maxSupportedTextureSlots = 0;
-
 template<typename T>
 void Renderer<T>::initialize()
 {
@@ -67,7 +65,6 @@ void Renderer<T>::initialize()
 template<typename T>
 void Renderer<T>::destroy()
 {
-	delete[] m_vertexBufferBase;
 }
 
 template<typename T>
@@ -124,32 +121,32 @@ void Renderer<T>::unbind()
 template<typename T>
 void Renderer<T>::createElementBuffer()
 {
-	// CPU
 	// ---------------------------------
+	// CPU
 
 	// Generate indices
 
-	uint32_t* indices = new uint32_t[maxElements];
+	uint32_t* elements = new uint32_t[maxElements];
 
 	uint32_t offset = 0;
 	for (uint32_t i = 0; i < maxElements; i += elementPerQuad) {
-		indices[i + 0] = offset + 0;
-		indices[i + 1] = offset + 1;
-		indices[i + 2] = offset + 2;
-		indices[i + 3] = offset + 2;
-		indices[i + 4] = offset + 3;
-		indices[i + 5] = offset + 0;
+		elements[i + 0] = offset + 0;
+		elements[i + 1] = offset + 1;
+		elements[i + 2] = offset + 2;
+		elements[i + 3] = offset + 2;
+		elements[i + 4] = offset + 3;
+		elements[i + 5] = offset + 0;
 
 		offset += vertexPerQuad;
 	}
 
-	// GPU
 	// ---------------------------------
+	// GPU
 
 	// Create index buffer
-	auto indexBuffer = std::make_shared<IndexBuffer>(indices, sizeof(uint32_t) * maxElements);
+	auto indexBuffer = std::make_shared<IndexBuffer>(elements, sizeof(uint32_t) * maxElements);
 	m_vertexArray->setIndexBuffer(indexBuffer);
-	delete[] indices;
+	delete[] elements;
 }
 
 template<typename T>
@@ -163,13 +160,14 @@ void Renderer<T>::flush()
 	uploadElementBuffer();
 
 	// Upload vertex data to GPU
-	m_vertexArray->at(0)->uploadData(m_vertexBufferBase, m_vertexIndex * sizeof(T));
+	m_vertexArray->at(0)->uploadData(m_vertexBufferBase.get(), m_vertexIndex * sizeof(T));
 
 	bind();
 
 	// Render
 	bool depthTest = RenderCommand::depthTest();
 	RenderCommand::setDepthTest(m_enableDepthBuffer);
+	RenderCommand::setColorAttachmentCount(m_colorAttachmentCount);
 	RenderCommand::drawIndexed(m_vertexArray, m_elementIndex);
 	RenderCommand::setDepthTest(depthTest);
 
@@ -181,7 +179,7 @@ void Renderer<T>::startBatch()
 {
 	m_vertexIndex = 0;
 	m_elementIndex = 0;
-	m_vertexBufferPtr = m_vertexBufferBase;
+	m_vertexBufferPtr = m_vertexBufferBase.get();
 
 	m_textureSlotIndex = 1;
 }
@@ -196,24 +194,35 @@ void Renderer<T>::nextBatch()
 // -----------------------------------------
 
 Renderer2D::Renderer2D(s)
+{
+	Renderer2D::initialize();
+}
+
+Renderer2D::~Renderer2D()
+{
+}
+
+void Renderer2D::initialize()
 {
 	Renderer::initialize();
 
-	// CPU
 	// ---------------------------------
+	// CPU
 
 	// Create array for storing quads vertices
-	m_vertexBufferBase = new QuadVertex[maxVertices];
-	m_vertexBufferPtr = m_vertexBufferBase;
+	m_vertexBufferBase = std::make_unique<QuadVertex[]>(maxVertices);
+	m_vertexBufferPtr = m_vertexBufferBase.get();
 
 	// Set default quad vertex positions
-	m_vertexPositions[0] = { -0.5f, -0.5f, 0.0f, 1.0f };
-	m_vertexPositions[1] = { 0.5f, -0.5f, 0.0f, 1.0f };
-	m_vertexPositions[2] = { 0.5f, 0.5f, 0.0f, 1.0f };
-	m_vertexPositions[3] = { -0.5f, 0.5f, 0.0f, 1.0f };
+	m_vertexPositions[0] = { -1.0f, -1.0f, 0.0f, 1.0f };
+	m_vertexPositions[1] = { 1.0f, -1.0f, 0.0f, 1.0f };
+	m_vertexPositions[2] = { 1.0f, 1.0f, 0.0f, 1.0f };
+	m_vertexPositions[3] = { -1.0f, 1.0f, 0.0f, 1.0f };
 
-	// GPU
 	// ---------------------------------
+	// GPU
+
+	m_enableDepthBuffer = false;
 
 	// Create vertex buffer
 	auto vertexBuffer = std::make_shared<VertexBuffer>(sizeof(QuadVertex) * maxVertices);
@@ -221,20 +230,13 @@ Renderer2D::Renderer2D(s)
 		{ BufferElementType::Vec3, "a_position" },
 		{ BufferElementType::Vec4, "a_color" },
 		{ BufferElementType::Vec2, "a_textureCoordinates" },
-		{ BufferElementType::Float, "a_textureIndex" },
+		{ BufferElementType::Uint, "a_textureIndex" },
 	});
 	m_vertexArray->addVertexBuffer(vertexBuffer);
 
 	ruc::info("Renderer2D initialized");
 }
 
-void Renderer2D::beginScene(glm::mat4 cameraProjection, glm::mat4 cameraView)
-{
-	m_shader->bind();
-	m_shader->setFloat("u_projectionView", cameraProjection * cameraView);
-	m_shader->unbind();
-}
-
 void Renderer2D::drawQuad(const TransformComponent& transform, glm::vec4 color)
 {
 	drawQuad(transform, color, nullptr);
@@ -271,7 +273,7 @@ void Renderer2D::drawQuad(const TransformComponent& transform, glm::mat4 color,
 		m_vertexBufferPtr->position = transform.transform * m_vertexPositions[i];
 		m_vertexBufferPtr->color = color[i];
 		m_vertexBufferPtr->textureCoordinates = textureCoordinates[i];
-		m_vertexBufferPtr->textureIndex = (float)textureUnitIndex;
+		m_vertexBufferPtr->textureIndex = textureUnitIndex;
 		m_vertexBufferPtr++;
 	}
 
@@ -281,21 +283,30 @@ void Renderer2D::drawQuad(const TransformComponent& transform, glm::mat4 color,
 
 void Renderer2D::loadShader()
 {
-	m_shader = AssetManager::the().load<Shader>("assets/glsl/batch-quad");
+	m_shader = AssetManager::the().load<Shader>("assets/glsl/batch-2d");
 }
 
 // -----------------------------------------
 
 RendererCubemap::RendererCubemap(s)
+{
+	RendererCubemap::initialize();
+}
+
+RendererCubemap::~RendererCubemap()
+{
+}
+
+void RendererCubemap::initialize()
 {
 	Renderer::initialize();
 
-	// CPU
 	// ---------------------------------
+	// CPU
 
 	// Create array for storing quads vertices
-	m_vertexBufferBase = new CubemapVertex[maxVertices];
-	m_vertexBufferPtr = m_vertexBufferBase;
+	m_vertexBufferBase = std::make_unique<CubemapVertex[]>(maxVertices);
+	m_vertexBufferPtr = m_vertexBufferBase.get();
 
 	// Set default cubemap vertex positions
 
@@ -335,8 +346,8 @@ RendererCubemap::RendererCubemap(s)
 	m_vertexPositions[22] = { 0.5f, -0.5f, 0.5f, 1.0f };
 	m_vertexPositions[23] = { 0.5f, -0.5f, -0.5f, 1.0f };
 
-	// GPU
 	// ---------------------------------
+	// GPU
 
 	m_enableDepthBuffer = false;
 
@@ -345,7 +356,7 @@ RendererCubemap::RendererCubemap(s)
 	vertexBuffer->setLayout({
 		{ BufferElementType::Vec3, "a_position" },
 		{ BufferElementType::Vec4, "a_color" },
-		{ BufferElementType::Float, "a_textureIndex" },
+		{ BufferElementType::Uint, "a_textureIndex" },
 	});
 	m_vertexArray->addVertexBuffer(vertexBuffer);
 
@@ -386,7 +397,7 @@ void RendererCubemap::drawCubemap(const TransformComponent& transform, glm::mat4
 	for (uint32_t i = 0; i < vertexPerQuad * quadPerCube; i++) {
 		m_vertexBufferPtr->position = transform.transform * m_vertexPositions[i];
 		m_vertexBufferPtr->color = color[i % 4];
-		m_vertexBufferPtr->textureIndex = (float)textureUnitIndex;
+		m_vertexBufferPtr->textureIndex = textureUnitIndex;
 		m_vertexBufferPtr++;
 	}
 
@@ -405,15 +416,15 @@ RendererFont::RendererFont(s)
 {
 	Renderer::initialize();
 
-	// CPU
 	// ---------------------------------
+	// CPU
 
 	// Create array for storing quads vertices
-	m_vertexBufferBase = new SymbolVertex[maxVertices];
-	m_vertexBufferPtr = m_vertexBufferBase;
+	m_vertexBufferBase = std::make_unique<SymbolVertex[]>(maxVertices);
+	m_vertexBufferPtr = m_vertexBufferBase.get();
 
-	// GPU
 	// ---------------------------------
+	// GPU
 
 	m_enableDepthBuffer = false;
 
@@ -423,7 +434,7 @@ RendererFont::RendererFont(s)
 		{ BufferElementType::Vec3, "a_position" },
 		{ BufferElementType::Vec4, "a_color" },
 		{ BufferElementType::Vec2, "a_textureCoordinates" },
-		{ BufferElementType::Float, "a_textureIndex" },
+		{ BufferElementType::Uint, "a_textureIndex" },
 		{ BufferElementType::Float, "a_width" },
 		{ BufferElementType::Float, "a_edge" },
 		{ BufferElementType::Float, "a_borderWidth" },
@@ -436,6 +447,10 @@ RendererFont::RendererFont(s)
 	ruc::info("RendererFont initialized");
 }
 
+RendererFont::~RendererFont()
+{
+}
+
 void RendererFont::drawSymbol(std::array<SymbolVertex, vertexPerQuad>& symbolQuad, std::shared_ptr<Texture> texture)
 {
 	// Create a new batch if the quad limit has been reached
@@ -450,7 +465,7 @@ void RendererFont::drawSymbol(std::array<SymbolVertex, vertexPerQuad>& symbolQua
 		m_vertexBufferPtr->quad.position = symbolQuad[i].quad.position;
 		m_vertexBufferPtr->quad.color = symbolQuad[i].quad.color;
 		m_vertexBufferPtr->quad.textureCoordinates = symbolQuad[i].quad.textureCoordinates;
-		m_vertexBufferPtr->quad.textureIndex = (float)textureUnitIndex;
+		m_vertexBufferPtr->quad.textureIndex = textureUnitIndex;
 
 		m_vertexBufferPtr->width = symbolQuad[i].width;
 		m_vertexBufferPtr->edge = symbolQuad[i].edge;
@@ -477,86 +492,93 @@ Renderer3D::Renderer3D(s)
 {
 	Renderer::initialize();
 
-	// CPU
 	// ---------------------------------
+	// CPU
 
 	// Create array for storing quads vertices
-	m_vertexBufferBase = new Vertex[maxVertices];
-	m_vertexBufferPtr = m_vertexBufferBase;
+	m_vertexBufferBase = std::make_unique<Vertex[]>(maxVertices);
+	m_vertexBufferPtr = m_vertexBufferBase.get();
 
-	// GPU
 	// ---------------------------------
+	// GPU
 
 	m_enableDepthBuffer = true;
+	m_colorAttachmentCount = 3;
 
 	// Create vertex buffer
 	auto vertexBuffer = std::make_shared<VertexBuffer>(sizeof(Vertex) * maxVertices);
 	vertexBuffer->setLayout({
 		{ BufferElementType::Vec3, "a_position" },
 		{ BufferElementType::Vec3, "a_normal" },
+		{ BufferElementType::Vec4, "a_color" },
 		{ BufferElementType::Vec2, "a_textureCoordinates" },
-		{ BufferElementType::Float, "a_textureIndex" },
+		{ BufferElementType::Uint, "a_textureIndex" },
 	});
 	m_vertexArray->addVertexBuffer(vertexBuffer);
 
 	ruc::info("Renderer3D initialized");
 }
 
-void Renderer3D::drawModel(std::span<const Vertex> vertices, std::span<const uint32_t> indices, const TransformComponent& transform, std::shared_ptr<Texture> texture)
+Renderer3D::~Renderer3D()
 {
-	VERIFY(vertices.size() <= maxVertices, "model vertices too big for buffer");
-	VERIFY(indices.size() <= maxElements, "model elements too big for buffer");
+}
+
+void Renderer3D::drawModel(std::span<const Vertex> vertices, std::span<const uint32_t> elements, const TransformComponent& transform, glm::vec4 color, std::shared_ptr<Texture> texture)
+{
+	// ruc::error("drawModel");
+
+	VERIFY(vertices.size() <= maxVertices, "model vertices too big for buffer, {}/{}", vertices.size(), maxVertices);
+	VERIFY(elements.size() <= maxElements, "model elements too big for buffer, {}/{}", elements.size(), maxElements);
 
 	// Create a new batch if the quad limit has been reached
-	if (m_vertexIndex + vertices.size() > maxVertices || m_elementIndex + indices.size() > maxElements) {
+	if (m_vertexIndex + vertices.size() > maxVertices || m_elementIndex + elements.size() > maxElements) {
 		nextBatch();
 	}
 
 	uint32_t textureUnitIndex = addTextureUnit(texture);
 
 	// Add the vertices
-	for (auto vertex : vertices) {
+	glm::mat3 normalMatrix = glm::mat3(glm::transpose(glm::inverse(transform.transform)));
+	for (const auto& vertex : vertices) {
 		m_vertexBufferPtr->position = transform.transform * glm::vec4(vertex.position, 1.0f);
-		m_vertexBufferPtr->normal = vertex.normal;
+		m_vertexBufferPtr->normal = normalMatrix * vertex.normal; // take non-uniform scaling into consideration
+		m_vertexBufferPtr->color = color;
 		m_vertexBufferPtr->textureCoordinates = vertex.textureCoordinates;
-		m_vertexBufferPtr->textureIndex = (float)textureUnitIndex;
+		m_vertexBufferPtr->textureIndex = textureUnitIndex;
 		m_vertexBufferPtr++;
 	}
 
-	std::copy(indices.begin(), indices.end(), m_elementBufferPtr);
-	m_elementBufferPtr += indices.size();
-
-	m_vertexIndex += vertices.size();
-	m_elementIndex += indices.size();
+	// Copy element indices to the element buffer
+	for (const auto& element : elements) {
+		// Indices are referenced relative to vertices[0], if there are multiple models in a batch,
+		// then the indices need to be offset by the total amount of vertices
+		*m_elementBufferPtr++ = element + m_vertexIndex;
 	}
 
-void Renderer3D::beginScene(glm::mat4 cameraProjection, glm::mat4 cameraView)
-{
-	m_shader->bind();
-	m_shader->setFloat("u_projectionView", cameraProjection * cameraView);
-	m_shader->unbind();
+	m_vertexIndex += vertices.size();
+	m_elementIndex += elements.size();
 }
 
 void Renderer3D::createElementBuffer()
 {
-	// CPU
 	// ---------------------------------
+	// CPU
 
 	// Create array for storing quads vertices
-	m_elementBufferBase = new uint32_t[maxElements];
-	m_elementBufferPtr = m_elementBufferBase;
+	m_elementBufferBase = std::make_unique<uint32_t[]>(maxElements);
+	m_elementBufferPtr = m_elementBufferBase.get();
 
-	// GPU
 	// ---------------------------------
+	// GPU
 
 	// Create index buffer
-	auto indexBuffer = std::make_shared<IndexBuffer>(m_elementBufferBase, sizeof(uint32_t) * maxElements);
+	auto indexBuffer = std::make_shared<IndexBuffer>(m_elementBufferBase.get(), sizeof(uint32_t) * maxElements);
 	m_vertexArray->setIndexBuffer(indexBuffer);
 }
 
 void Renderer3D::uploadElementBuffer()
 {
-	m_vertexArray->getIndexBuffer()->uploadData(m_elementBufferBase, m_elementIndex * sizeof(uint32_t));
+	m_vertexArray->indexBuffer()->uploadData(m_elementBufferBase.get(), m_elementIndex * sizeof(uint32_t));
 }
 
 void Renderer3D::loadShader()
@@ -567,7 +589,72 @@ void Renderer3D::loadShader()
 void Renderer3D::startBatch()
 {
 	Renderer<Vertex>::startBatch();
-	m_elementBufferPtr = m_elementBufferBase;
+	m_elementBufferPtr = m_elementBufferBase.get();
+}
+
+// -----------------------------------------
+
+RendererPostProcess::RendererPostProcess(s)
+{
+	Renderer2D::initialize();
+
+	ruc::info("RendererPostProcess initialized");
+}
+
+RendererPostProcess::~RendererPostProcess()
+{
+}
+
+void RendererPostProcess::drawQuad(const TransformComponent& transform, std::shared_ptr<Texture> albedo, std::shared_ptr<Texture> position, std::shared_ptr<Texture> normal)
+{
+	nextBatch();
+
+	constexpr glm::vec2 textureCoordinates[] = {
+		{ 0.0f, 0.0f },
+		{ 1.0f, 0.0f },
+		{ 1.0f, 1.0f },
+		{ 0.0f, 1.0f }
+	};
+
+	uint32_t textureUnitIndex = addTextureUnit(albedo);
+	addTextureUnit(position);
+	addTextureUnit(normal);
+
+	// Add the quads 4 vertices
+	for (uint32_t i = 0; i < vertexPerQuad; i++) {
+		m_vertexBufferPtr->position = transform.transform * m_vertexPositions[i];
+		m_vertexBufferPtr->textureCoordinates = textureCoordinates[i];
+		m_vertexBufferPtr->textureIndex = textureUnitIndex;
+		m_vertexBufferPtr++;
+	}
+
+	m_vertexIndex += vertexPerQuad;
+	m_elementIndex += elementPerQuad;
+}
+
+void RendererPostProcess::loadShader()
+{
+	m_shader = AssetManager::the().load<Shader>("assets/glsl/post-process");
+}
+
+// -----------------------------------------
+
+RendererLightCube::RendererLightCube(s)
+{
+	RendererCubemap::initialize();
+
+	m_enableDepthBuffer = true;
+
+	ruc::info("RendererLightCube initialized");
+}
+
+RendererLightCube::~RendererLightCube()
+{
+}
+
+void RendererLightCube::loadShader()
+{
+	m_shader = AssetManager::the().load<Shader>("assets/glsl/lightsource");
 }
 
 } // namespace Inferno

src/inferno/render/renderer.h

@@ -16,24 +16,25 @@
 #include "glm/ext/vector_float4.hpp"   // glm::vec4
 #include "ruc/singleton.h"
 
+#include "inferno/asset/shader.h"
+
 namespace Inferno {
 
-class Shader;
 class Texture;
 class TransformComponent;
 class VertexArray;
 
 struct QuadVertex {
-	glm::vec3 position { 0.0f, 0.0f, 0.0f };
-	glm::vec4 color { 1.0f, 1.0f, 1.0f, 1.0f };
-	glm::vec2 textureCoordinates { 0.0f, 0.0f };
-	float textureIndex = 0;
+	glm::vec3 position { 0.0f };
+	glm::vec4 color { 1.0f };
+	glm::vec2 textureCoordinates { 0.0f };
+	uint32_t textureIndex { 0 };
 };
 
 struct CubemapVertex {
-	glm::vec3 position { 0.0f, 0.0f, 0.0f };
-	glm::vec4 color { 1.0f, 1.0f, 1.0f, 1.0f };
-	float textureIndex = 0;
+	glm::vec3 position { 0.0f };
+	glm::vec4 color { 1.0f };
+	uint32_t textureIndex { 0 };
 };
 
 struct SymbolVertex {
@@ -45,16 +46,17 @@ struct SymbolVertex {
 	// Outline
 	float borderWidth = 0.7f;
 	float borderEdge = 0.1f;
-	glm::vec4 borderColor { 1.0f, 1.0f, 1.0f, 1.0f };
+	glm::vec4 borderColor { 1.0f };
 	// Dropshadow
 	float offset = 0.0f;
 };
 
 struct Vertex {
-	glm::vec3 position { 0.0f, 0.0f, 0.0f };
-	glm::vec3 normal { 1.0f, 1.0f, 1.0f };
-	glm::vec2 textureCoordinates { 0.0f, 0.0f };
-	float textureIndex = 0;
+	glm::vec3 position { 0.0f };
+	glm::vec3 normal { 1.0f };
+	glm::vec4 color { 1.0f };
+	glm::vec2 textureCoordinates { 0.0f };
+	uint32_t textureIndex { 0 };
 };
 
 // -------------------------------------
@@ -62,6 +64,8 @@ struct Vertex {
 template<typename T>
 class Renderer {
 public:
+	static constexpr const uint32_t vertexPerFace = 3;
+	static constexpr const uint32_t elementPerFace = 3;
 	static constexpr const uint32_t vertexPerQuad = 4;
 	static constexpr const uint32_t elementPerQuad = 6;
 
@@ -74,6 +78,10 @@ public:
 	virtual void beginScene(glm::mat4 cameraProjection, glm::mat4 cameraView);
 	virtual void endScene();
 
+	void setEnableDepthBuffer(bool state) { m_enableDepthBuffer = state; }
+
+	uint32_t shaderID() const { return m_shader->id(); }
+
 protected:
 	Renderer() {}
 	virtual ~Renderer() { destroy(); };
@@ -97,16 +105,17 @@ protected:
 	// CPU quad vertices
 	uint32_t m_vertexIndex { 0 };
 	uint32_t m_elementIndex { 0 };
-	T* m_vertexBufferBase { nullptr };
+	std::unique_ptr<T[]> m_vertexBufferBase { nullptr };
 	T* m_vertexBufferPtr { nullptr };
 
 	// Texture units
-	static uint32_t m_maxSupportedTextureSlots;
+	static inline uint32_t m_maxSupportedTextureSlots { 0 };
 	uint32_t m_textureSlotIndex { 1 };
 	std::array<std::shared_ptr<Texture>, maxTextureSlots> m_textureSlots;
 
 	// GPU objects
 	bool m_enableDepthBuffer { true };
+	uint32_t m_colorAttachmentCount { 1 };
 	std::shared_ptr<Shader> m_shader;
 	std::shared_ptr<VertexArray> m_vertexArray;
 };
@@ -119,31 +128,34 @@ protected:
 
 // -------------------------------------
 
-class Renderer2D final
+class Renderer2D
 	: public Renderer<QuadVertex>
 	, public ruc::Singleton<Renderer2D> {
 public:
 	Renderer2D(s);
-	virtual ~Renderer2D() = default;
+	virtual ~Renderer2D();
 
 	using Singleton<Renderer2D>::destroy;
 
-	virtual void beginScene(glm::mat4 cameraProjection, glm::mat4 cameraView) override;
-
 	void drawQuad(const TransformComponent& transform, glm::vec4 color);
 	void drawQuad(const TransformComponent& transform, glm::mat4 color);
 	void drawQuad(const TransformComponent& transform, glm::vec4 color, std::shared_ptr<Texture> texture);
 	void drawQuad(const TransformComponent& transform, glm::mat4 color, std::shared_ptr<Texture> texture);
 
-private:
-	void loadShader() override;
+protected:
+	Renderer2D() {} // Needed for derived classes
+
+	void initialize();
 
 	// Default quad vertex positions
 	glm::vec4 m_vertexPositions[vertexPerQuad];
+
+private:
+	virtual void loadShader() override;
 };
 // -------------------------------------
 
-class RendererCubemap final
+class RendererCubemap
 	: public Renderer<CubemapVertex>
 	, public ruc::Singleton<RendererCubemap> {
 public:
@@ -151,7 +163,7 @@ public:
 
 public:
 	RendererCubemap(s);
-	virtual ~RendererCubemap() = default;
+	virtual ~RendererCubemap();
 
 	using Singleton<RendererCubemap>::destroy;
 
@@ -160,8 +172,13 @@ public:
 	void drawCubemap(const TransformComponent& transform, glm::vec4 color, std::shared_ptr<Texture> texture);
 	void drawCubemap(const TransformComponent& transform, glm::mat4 color, std::shared_ptr<Texture> texture);
 
+protected:
+	RendererCubemap() {} // Needed for derived classes
+
+	void initialize();
+
 private:
-	void loadShader() override;
+	virtual void loadShader() override;
 
 	// Default cubemap vertex positions
 	glm::vec4 m_vertexPositions[vertexPerQuad * quadPerCube];
@@ -174,7 +191,7 @@ class RendererFont final
 	, public ruc::Singleton<RendererFont> {
 public:
 	RendererFont(s);
-	virtual ~RendererFont() = default;
+	virtual ~RendererFont();
 
 	using Singleton<RendererFont>::destroy;
 
@@ -191,13 +208,11 @@ class Renderer3D final
 	, public ruc::Singleton<Renderer3D> {
 public:
 	Renderer3D(s);
-	virtual ~Renderer3D() = default;
+	virtual ~Renderer3D();
 
 	using Singleton<Renderer3D>::destroy;
 
-	virtual void beginScene(glm::mat4 cameraProjection, glm::mat4 cameraView) override;
-
-	void drawModel(std::span<const Vertex> vertices, std::span<const uint32_t> indices, const TransformComponent& transform, std::shared_ptr<Texture> texture);
+	void drawModel(std::span<const Vertex> vertices, std::span<const uint32_t> indices, const TransformComponent& transform, glm::vec4 color, std::shared_ptr<Texture> texture);
 
 private:
 	void createElementBuffer() override;
@@ -207,8 +222,46 @@ private:
 
 private:
 	// CPU element vertices
-	uint32_t* m_elementBufferBase { nullptr };
+	std::unique_ptr<uint32_t[]> m_elementBufferBase { nullptr };
 	uint32_t* m_elementBufferPtr { nullptr };
 };
 
+// -----------------------------------------
+
+class RendererPostProcess final
+	: public Renderer2D
+	, public ruc::Singleton<RendererPostProcess> {
+public:
+	using Singleton<RendererPostProcess>::s;
+	using Singleton<RendererPostProcess>::the;
+	using Singleton<RendererPostProcess>::destroy;
+
+	RendererPostProcess(s);
+	virtual ~RendererPostProcess();
+
+	void drawQuad(const TransformComponent& transform, std::shared_ptr<Texture> albedo, std::shared_ptr<Texture> position, std::shared_ptr<Texture> normal);
+
+private:
+	virtual void loadShader() override;
+};
+
+// -----------------------------------------
+
+class RendererLightCube final
+	: public RendererCubemap
+	, public ruc::Singleton<RendererLightCube> {
+public:
+	using Singleton<RendererLightCube>::s;
+	using Singleton<RendererLightCube>::the;
+	using Singleton<RendererLightCube>::destroy;
+
+	RendererLightCube(s);
+	virtual ~RendererLightCube();
+
+	void beginScene(glm::mat4, glm::mat4) override {}
+
+private:
+	virtual void loadShader() override;
+};
+
 } // namespace Inferno

src/inferno/render/shader-storage-buffer.cpp

@@ -0,0 +1,195 @@
+/*
+ * Copyright (C) 2024 Riyyi
+ *
+ * SPDX-License-Identifier: MIT
+ */
+
+#include <cstdint> // int32_t, uint8_t, uintt32_t
+
+#include "glad/glad.h"
+#include "glm/ext/matrix_float2x2.hpp" // glm::mat2
+#include "glm/ext/matrix_float3x3.hpp" // glm::mat3
+#include "glm/ext/vector_float4.hpp"   // glm::vec4
+
+#include "inferno/render/buffer.h"
+#include "inferno/render/shader-storage-buffer.h"
+
+namespace Inferno {
+
+ShaderStorageBuffer::ShaderStorageBuffer(s)
+{
+	// Get maximum uniformbuffer bindings the GPU supports
+	int32_t maxBindingPoints = 0;
+	glGetIntegerv(GL_MAX_SHADER_STORAGE_BUFFER_BINDINGS, &maxBindingPoints);
+	m_maxBindingPoints = static_cast<uint8_t>(maxBindingPoints);
+}
+
+ShaderStorageBuffer::~ShaderStorageBuffer()
+{
+}
+
+// -----------------------------------------
+
+// https://stackoverflow.com/questions/56512216#answer-56513136
+void ShaderStorageBuffer::setLayout(std::string_view blockName, uint8_t bindingPoint, uint32_t shaderID)
+{
+	VERIFY(bindingPoint < m_maxBindingPoints,
+	       "shader storage buffer exceeded binding points: {}/{}", bindingPoint, m_maxBindingPoints);
+
+	if (!exists(blockName)) {
+		m_blocks[blockName.data()] = {};
+	}
+
+	BufferBlock& block = m_blocks[blockName.data()];
+	block.bindingPoint = bindingPoint;
+	block.memberOffsets.clear();
+
+	glBindBuffer(GL_SHADER_STORAGE_BUFFER, block.id);
+
+	// Get the shader block index
+	uint32_t resourceIndex = glGetProgramResourceIndex(shaderID, GL_SHADER_STORAGE_BLOCK, blockName.data());
+	VERIFY(resourceIndex != GL_INVALID_INDEX, "block doesnt exist in shader: {}::{}", blockName, shaderID);
+
+	// Get the amount of member variables
+	uint32_t prop = GL_NUM_ACTIVE_VARIABLES;
+	int32_t memberCount;
+	glGetProgramResourceiv(shaderID, GL_SHADER_STORAGE_BLOCK, resourceIndex, 1, &prop, 1, nullptr, &memberCount);
+
+	// Get the indices of the members
+	prop = GL_ACTIVE_VARIABLES;
+	std::vector<int32_t> members(memberCount);
+	glGetProgramResourceiv(shaderID, GL_SHADER_STORAGE_BLOCK, resourceIndex, 1, &prop, (int32_t)members.size(), nullptr, members.data());
+
+	// Reserve memory for the names of the members
+	int32_t memberNameSize;
+	glGetProgramInterfaceiv(shaderID, GL_BUFFER_VARIABLE, GL_MAX_NAME_LENGTH, &memberNameSize);
+	std::vector<char> memberNameBuffer(memberNameSize);
+
+	int32_t lastOffset = 0;
+	int32_t lastType = 0;
+	for (int32_t i = 0; i < memberCount; i++) {
+
+		// Get name of buffer variable
+		int32_t stringLength;
+		glGetProgramResourceName(shaderID, GL_BUFFER_VARIABLE, members[i], memberNameSize, &stringLength, memberNameBuffer.data());
+		std::string memberName = std::string(memberNameBuffer.begin(), memberNameBuffer.begin() + stringLength);
+
+		// Get the other data needed for computing
+
+		uint32_t props[7] = {
+			GL_OFFSET,                 // 0
+			GL_TYPE,                   // 1
+			GL_ARRAY_SIZE,             // 2
+			GL_ARRAY_STRIDE,           // 3
+			GL_MATRIX_STRIDE,          // 4
+			GL_TOP_LEVEL_ARRAY_SIZE,   // 5
+			GL_TOP_LEVEL_ARRAY_STRIDE, // 6
+		};
+		int32_t params[7];
+		glGetProgramResourceiv(shaderID, GL_BUFFER_VARIABLE, members[i], 7, props, 7, nullptr, params);
+
+		// ruc::error("{}", memberName);
+		// ruc::error("\n    Offset: {}, type: {:#x}, arraySize: {}, arrayStride: {},\n    matrixStride: {}, top level size: {}, top level stride: {}\n",
+		//            params[0], params[1], params[2], params[3], params[4], params[5], params[6]);
+
+		// Array of structs
+		if (params[5] != 1 && params[6 != 0]) {
+			size_t bracketOpen = memberName.find_first_of('[');
+			size_t bracketClose = memberName.find_first_of(']');
+			std::string memberNameBegin = memberName.substr(0, bracketOpen);    // name: myArray[0].member -> myArray
+			std::string memberNameMember = memberName.substr(bracketClose + 1); // name: myArray[0].member -> .member
+			for (int32_t j = 0; j < params[5]; ++j) {
+				lastOffset = params[0] + (j * params[6]); // calc offset
+				lastType = params[1];
+
+				// Only add the member variant the first time its encountered
+				if (j == 0 && block.memberOffsets.find(memberNameBegin) == block.memberOffsets.end()) {
+					block.memberOffsets.emplace(memberNameBegin, lastOffset); // name: myArray
+				}
+
+				// Only add the index variant the first time its encountered
+				std::string memberNameIndex = memberNameBegin + "[" + std::to_string(j) + "]"; // name: myArray -> myArray[i]
+				if (block.memberOffsets.find(memberNameIndex) == block.memberOffsets.end()) {
+					block.memberOffsets.emplace(memberNameIndex, lastOffset);
+				}
+
+				block.memberOffsets.emplace(memberNameIndex + memberNameMember, // name: myArray -> myArray[i].member
+				                            lastOffset);
+			}
+		}
+		// Array of primitives
+		else if (params[2] != 1 && params[3] != 0) {
+			std::string memberNameBegin = memberName.substr(0, memberName.find_first_of('[')); // name: myArray[0] -> myArray
+			for (int32_t j = 0; j < params[2]; ++j) {
+				lastOffset = params[0] + (j * params[3]); // calc offset
+				lastType = params[1];
+
+				// Only add the member variant the first time its encountered
+				if (j == 0) {
+					block.memberOffsets.emplace(memberNameBegin, lastOffset); // name: myArray
+				}
+
+				block.memberOffsets.emplace(memberNameBegin + "[" + std::to_string(j) + "]", // name: myArray -> myArray[i]
+				                            lastOffset);
+			}
+		}
+		// Matrix case
+		else if (params[4] != 0) {
+			lastType = params[1];
+			lastOffset = params[0];
+			block.memberOffsets.emplace(memberName, params[0]);
+		}
+		else {
+			lastType = params[1];
+			lastOffset = params[0];
+			block.memberOffsets.emplace(memberName, params[0]);
+		}
+	}
+
+	block.size = lastOffset + BufferElement::getGLTypeSize(lastType);
+
+	glBindBuffer(GL_SHADER_STORAGE_BUFFER, 0);
+
+	// Results
+	// for (auto [k, v] : block.memberOffsets) {
+	// 	ruc::error("{}:{}", k, v);
+	// }
+}
+
+void ShaderStorageBuffer::create(std::string_view blockName)
+{
+	VERIFY(exists(blockName), "shader storage buffer block doesnt exist");
+
+	BufferBlock& block = m_blocks[blockName.data()];
+
+	if (block.id != 0) {
+		glDeleteBuffers(1, &block.id);
+	}
+
+	// Allocate buffer
+	block.id = UINT_MAX;
+	glGenBuffers(1, &block.id);
+	glBindBuffer(GL_SHADER_STORAGE_BUFFER, block.id);
+	glBufferData(GL_SHADER_STORAGE_BUFFER, block.size, NULL, GL_DYNAMIC_DRAW);
+	glBindBuffer(GL_SHADER_STORAGE_BUFFER, 0);
+
+	// Bind buffer to binding point
+	glBindBufferBase(GL_SHADER_STORAGE_BUFFER, block.bindingPoint, block.id);
+}
+
+void ShaderStorageBuffer::setValue(std::string_view blockName, std::string_view member, bool value)
+{
+	setValue(blockName, member, static_cast<uint32_t>(value), sizeof(uint32_t));
+}
+
+void ShaderStorageBuffer::setValue(std::string_view blockName, std::string_view member, glm::mat2 value)
+{
+	setValue(blockName, member, static_cast<glm::mat4>(value), sizeof(glm::vec4) * 2);
+}
+
+void ShaderStorageBuffer::setValue(std::string_view blockName, std::string_view member, glm::mat3 value)
+{
+	setValue(blockName, member, static_cast<glm::mat4>(value), sizeof(glm::vec4) * 3);
+}
+
+} // namespace Inferno

src/inferno/render/shader-storage-buffer.h

@@ -0,0 +1,63 @@
+/*
+ * Copyright (C) 2024 Riyyi
+ *
+ * SPDX-License-Identifier: MIT
+ */
+
+#pragma once
+
+#include <cstddef> // size_t
+#include <cstdint> // uint8_t, uint32_t
+#include <string_view>
+#include <unordered_map>
+
+#include "glad/glad.h"
+#include "glm/ext/matrix_float2x2.hpp" // glm::mat2
+#include "glm/ext/matrix_float3x3.hpp" // glm::mat3
+#include "ruc/singleton.h"
+
+#define CHECK_SET_CALL(blockName, member)                                                 \
+	VERIFY(exists(blockName), "shader storage buffer block doesnt exist: {}", blockName); \
+	const BufferBlock& block = m_blocks[blockName.data()];                                \
+	VERIFY(block.memberOffsets.find(member.data()) != block.memberOffsets.end(),          \
+	       "shader storage buffer member doesnt exist: {}", member);
+
+namespace Inferno {
+
+struct BufferBlock {
+	uint32_t id { 0 };
+	uint32_t size { 0 };
+	uint8_t bindingPoint { 0 };
+	std::unordered_map<std::string, uint32_t> memberOffsets {};
+};
+
+class ShaderStorageBuffer final : public ruc::Singleton<ShaderStorageBuffer> { // Shader Storage Buffer Object, SSBO
+public:
+	ShaderStorageBuffer(s);
+	virtual ~ShaderStorageBuffer();
+
+	void setLayout(std::string_view blockName, uint8_t bindingPoint, uint32_t shaderID);
+	void create(std::string_view blockName);
+
+	bool exists(std::string_view blockName) const { return m_blocks.find(blockName.data()) != m_blocks.end(); }
+
+	template<typename T> // Capture value by reference, instead of decaying to pointer
+	void setValue(std::string_view blockName, std::string_view member, T&& value, size_t size = 0)
+	{
+		CHECK_SET_CALL(blockName, member);
+
+		glBindBuffer(GL_SHADER_STORAGE_BUFFER, block.id);
+		glBufferSubData(GL_SHADER_STORAGE_BUFFER, block.memberOffsets.at(member.data()), (size) ? size : sizeof(T), &value);
+		glBindBuffer(GL_SHADER_STORAGE_BUFFER, 0);
+	}
+	// Exceptions:
+	void setValue(std::string_view blockName, std::string_view member, bool value);
+	void setValue(std::string_view blockName, std::string_view member, glm::mat2 value);
+	void setValue(std::string_view blockName, std::string_view member, glm::mat3 value);
+
+private:
+	uint8_t m_maxBindingPoints { 0 };
+	std::unordered_map<std::string, BufferBlock> m_blocks;
+};
+
+} // namespace Inferno

src/inferno/render/shader-structs.h

@@ -0,0 +1,24 @@
+/*
+ * Copyright (C) 2024 Riyyi
+ *
+ * SPDX-License-Identifier: MIT
+ */
+
+#pragma once
+
+#include "glm/ext/vector_float3.hpp" // glm::vec3
+
+namespace Inferno {
+
+// Shader storage block layouts, using std430 memory layout rules
+
+#define MAX_DIRECTIONAL_LIGHTS 4
+struct alignas(16) DirectionalLightBlock {
+	alignas(16) glm::vec3 direction { 0 };
+
+	alignas(16) glm::vec3 ambient { 0 };
+	alignas(16) glm::vec3 diffuse { 0 };
+	alignas(16) glm::vec3 specular { 0 };
+};
+
+} // namespace Inferno

src/inferno/render/uniformbuffer.cpp

@@ -0,0 +1,241 @@
+/*
+ * Copyright (C) 2024 Riyyi
+ *
+ * SPDX-License-Identifier: MIT
+ */
+
+#include <cstddef> // size_t
+#include <cstdint> // int32_t, uint32_t, uint8_t
+#include <string_view>
+
+#include "glad/glad.h"
+#include "glm/ext/matrix_float2x2.hpp" // glm::mat2
+#include "glm/ext/matrix_float3x3.hpp" // glm::mat3
+#include "glm/gtc/type_ptr.hpp"        // glm::value_ptr
+#include "ruc/meta/assert.h"
+
+#include "inferno/render/buffer.h"
+#include "inferno/render/uniformbuffer.h"
+
+namespace Inferno {
+
+Uniformbuffer::Uniformbuffer(s)
+{
+	// Get maximum uniformbuffer bindings the GPU supports
+	int32_t maxBindingPoints = 0;
+	glGetIntegerv(GL_MAX_UNIFORM_BUFFER_BINDINGS, &maxBindingPoints);
+	m_maxBindingPoints = static_cast<uint8_t>(maxBindingPoints);
+}
+
+Uniformbuffer::~Uniformbuffer()
+{
+	for (const auto& [_, block] : m_blocks) {
+		glDeleteBuffers(1, &block.id);
+	}
+	m_blocks.clear();
+}
+
+// -----------------------------------------
+
+void Uniformbuffer::setLayout(std::string_view blockName, const UniformbufferBlock& block)
+{
+	VERIFY(block.size && block.bindingPoint && block.uniformLocations.size(),
+	       "invalid uniformbuffer block definition: {}", blockName);
+
+	VERIFY(block.bindingPoint < m_maxBindingPoints,
+	       "uniformbuffer exceeded binding points: {}/{}", block.bindingPoint, m_maxBindingPoints);
+
+	m_blocks[blockName] = block;
+}
+
+void Uniformbuffer::setLayout(std::string_view blockName, uint8_t bindingPoint, const BufferLayout& layout)
+{
+	VERIFY(bindingPoint < m_maxBindingPoints,
+	       "uniformbuffer exceeded binding points: {}/{}", bindingPoint, m_maxBindingPoints);
+
+	if (!exists(blockName)) {
+		m_blocks[blockName] = {};
+	}
+
+	UniformbufferBlock& block = m_blocks[blockName];
+	block.bindingPoint = bindingPoint;
+	block.uniformLocations.clear();
+
+	// Example block layout:
+	// - mat3
+	// - float
+	// - vec2
+	// - vec2
+	// - float
+
+	// Chunks, 4 slots, 4 bytes per slot
+	// [x][x][x][ ] #1
+	// [x][x][x][ ] #2
+	// [x][x][x][ ] #3
+	// [x][ ][x][x] #4
+	// [x][x][x][ ] #5
+
+	size_t chunk = 0;
+	uint8_t offset = 0;
+
+	for (auto it = layout.begin(); it != layout.end(); ++it) {
+		BufferElementType type = it->type();
+		const std::string& name = it->name();
+
+		// Calculate offset
+		switch (type) {
+			// Scalar 1
+		case BufferElementType::Bool:
+		case BufferElementType::Int:
+		case BufferElementType::Uint:
+		case BufferElementType::Float: {
+			// Offset
+			block.uniformLocations[name] = (chunk * 16) + (offset * 4);
+			// Jump
+			offset += 1;
+			break;
+		}
+			// Scalar 2
+		case BufferElementType::Bool2:
+		case BufferElementType::Int2:
+		case BufferElementType::Uint2:
+		case BufferElementType::Vec2: {
+			// Add padding
+			if (offset == 1) {
+				offset++;
+			}
+			if (offset == 3) {
+				offset = 0;
+				chunk++;
+			}
+			// Offset
+			block.uniformLocations[name] = (chunk * 16) + (offset * 4);
+			// Jump
+			offset += 2;
+			break;
+		}
+			// Scalar 3
+		case BufferElementType::Bool3:
+		case BufferElementType::Int3:
+		case BufferElementType::Uint3:
+		case BufferElementType::Vec3: {
+			// Add padding
+			if (offset != 0) {
+				offset = 0;
+				chunk++;
+			}
+			// Offset
+			block.uniformLocations[name] = (chunk * 16) + (offset * 4);
+			// Jump
+			offset += 3;
+			break;
+		}
+			// Scalar 4
+		case BufferElementType::Bool4:
+		case BufferElementType::Int4:
+		case BufferElementType::Uint4:
+		case BufferElementType::Vec4: {
+			// Add padding
+			if (offset != 0) {
+				offset = 0;
+				chunk++;
+			}
+			// Offset
+			block.uniformLocations[name] = (chunk * 16) + (offset * 4);
+			// Jump
+			offset += 4;
+			break;
+		}
+			// Array types
+		case BufferElementType::Mat2:
+		case BufferElementType::Mat3:
+		case BufferElementType::Mat4: {
+			// Add padding
+			if (offset != 0) {
+				offset = 0;
+				chunk++;
+			}
+			// Offset
+			block.uniformLocations[name] = (chunk * 16) + (offset * 4);
+
+			// Additional rows
+			if (type == BufferElementType::Mat2) {
+				chunk += 1;
+			}
+			else if (type == BufferElementType::Mat3) {
+				chunk += 2;
+			}
+			else {
+				chunk += 3;
+			}
+
+			// Jump
+			offset += 4;
+			break;
+		}
+			// TODO: Implement these types
+		case BufferElementType::Double:
+		case BufferElementType::Vec2Double:
+		case BufferElementType::Vec3Double:
+		case BufferElementType::Vec4Double:
+		case BufferElementType::MatDouble2:
+		case BufferElementType::MatDouble3:
+		case BufferElementType::MatDouble4:
+			VERIFY_NOT_REACHED();
+		case BufferElementType::None:
+			VERIFY_NOT_REACHED();
+		};
+
+		// Overflow slots to next chunk
+		if (offset > 3) {
+			offset = 0;
+			chunk++;
+		}
+	}
+
+	// Pad the end of the buffer
+	if (offset != 0) {
+		offset = 0;
+		chunk++;
+	}
+
+	block.size = chunk * 16;
+}
+
+void Uniformbuffer::create(std::string_view blockName)
+{
+	VERIFY(exists(blockName), "uniformbuffer block doesnt exist");
+
+	UniformbufferBlock& block = m_blocks[blockName];
+
+	if (block.id != 0) {
+		glDeleteBuffers(1, &block.id);
+	}
+
+	// Allocate buffer
+	block.id = UINT_MAX;
+	glGenBuffers(1, &block.id);
+	glBindBuffer(GL_UNIFORM_BUFFER, block.id);
+	glBufferData(GL_UNIFORM_BUFFER, block.size, NULL, GL_DYNAMIC_DRAW);
+	glBindBuffer(GL_UNIFORM_BUFFER, 0);
+
+	// Bind buffer to binding point
+	glBindBufferBase(GL_UNIFORM_BUFFER, block.bindingPoint, block.id);
+}
+
+void Uniformbuffer::setValue(std::string_view blockName, std::string_view member, bool value)
+{
+	setValue(blockName, member, static_cast<uint32_t>(value), sizeof(uint32_t));
+}
+
+void Uniformbuffer::setValue(std::string_view blockName, std::string_view member, glm::mat2 value)
+{
+	setValue(blockName, member, static_cast<glm::mat4>(value), sizeof(glm::vec4) * 2);
+}
+
+void Uniformbuffer::setValue(std::string_view blockName, std::string_view member, glm::mat3 value)
+{
+	setValue(blockName, member, static_cast<glm::mat4>(value), sizeof(glm::vec4) * 3);
+}
+
+} // namespace Inferno

src/inferno/render/uniformbuffer.h

@@ -0,0 +1,114 @@
+/*
+ * Copyright (C) 2024 Riyyi
+ *
+ * SPDX-License-Identifier: MIT
+ */
+
+#pragma once
+
+#include <cstddef> // size_t
+#include <cstdint> // uint8_t, uint32_t
+#include <string>
+#include <string_view>
+#include <unordered_map>
+
+#include "glad/glad.h"
+#include "glm/ext/matrix_float2x2.hpp" // glm::mat2
+#include "glm/ext/matrix_float3x3.hpp" // glm::mat3
+#include "ruc/singleton.h"
+
+#include "inferno/render/buffer.h"
+
+#define CHECK_UNIFORM_SET_CALL(blockName, member)                                      \
+	VERIFY(exists(blockName), "uniformbuffer block doesnt exist: {}", blockName);      \
+	const UniformbufferBlock& block = m_blocks[blockName];                             \
+	VERIFY(block.uniformLocations.find(member.data()) != block.uniformLocations.end(), \
+	       "uniformbuffer member doesnt exist: {}", member);
+
+namespace Inferno {
+
+struct UniformbufferBlock {
+	uint32_t id { 0 };
+	uint32_t size { 0 };
+	uint8_t bindingPoint { 0 };
+	std::unordered_map<std::string, uint32_t> uniformLocations {};
+};
+
+class Uniformbuffer final : public ruc::Singleton<Uniformbuffer> { // Uniform Buffer Object, UBO
+public:
+	Uniformbuffer(s);
+	~Uniformbuffer();
+
+	void setLayout(std::string_view blockName, const UniformbufferBlock& block);
+	void setLayout(std::string_view blockName, uint8_t bindingPoint, const BufferLayout& layout);
+	void create(std::string_view blockName);
+
+	template<typename T> // Capture value by reference, instead of decaying to pointer
+	void setValue(std::string_view blockName, std::string_view member, T&& value, size_t size = 0)
+	{
+		CHECK_UNIFORM_SET_CALL(blockName, member);
+
+		glBindBuffer(GL_UNIFORM_BUFFER, block.id);
+		glBufferSubData(GL_UNIFORM_BUFFER, block.uniformLocations.at(member.data()), (size) ? size : sizeof(T), &value);
+		glBindBuffer(GL_UNIFORM_BUFFER, 0);
+	}
+	// Exceptions:
+	void setValue(std::string_view blockName, std::string_view member, bool value);
+	void setValue(std::string_view blockName, std::string_view member, glm::mat2 value);
+	void setValue(std::string_view blockName, std::string_view member, glm::mat3 value);
+
+	bool exists(std::string_view blockName) const { return m_blocks.find(blockName) != m_blocks.end(); }
+
+private:
+	uint8_t m_maxBindingPoints { 0 };
+	std::unordered_map<std::string_view, UniformbufferBlock> m_blocks;
+};
+
+} // namespace Inferno
+
+#if 0
+
+// -----------------------------------------
+// Example usage:
+
+Uniformbuffer::the().setLayout(
+	"ExampleBlock", 0,
+	{
+		{ BufferElementType::Mat3,  "a" },
+		{ BufferElementType::Float, "b" },
+		{ BufferElementType::Vec2,  "c" },
+		{ BufferElementType::Vec2,  "d" },
+		{ BufferElementType::Float, "e" },
+	});
+Uniformbuffer::the().create("ExampleBlock");
+
+#endif
+
+// -----------------------------------------
+// Memory alignment of uniform blocks using std140
+//
+// Main points:
+// - Memory is organized into chunks.
+// - A block is at least the size of 1 chunk.
+// - One chunk has 4 slots, 4 bytes per slot.
+// - Can't fit? Move to next chunk.
+//
+// The rules:
+// 1. Scalar (bool, int, uint, float) takes up 1 slot, can appear after anything
+// 2. Vec2 takes up 2 slots, in first or last half of a chunk
+// 3. Vec3 takes up 3 slots, only at the start of a chunk
+// 4. Everything else:
+//      - Take up maxumum room
+//      - As often as needed
+//      - Add padding as needed
+// 5. Mat3 (or any matrix) are treated like arrays
+// 6. Each member of *any* array gets its own chunk
+
+// TODO: How do double types work?
+
+// -----------------------------------------
+// References:
+// - https://learnopengl.com/Advanced-OpenGL/Advanced-GLSL
+// - https://www.khronos.org/opengl/wiki/Interface_Block_(GLSL)#Memory_layout
+// - https://www.oreilly.com/library/view/opengl-programming-guide/9780132748445/app09lev1sec2.html (The std140 Layout Rules)
+// - https://www.youtube.com/watch?v=JPvbRko9lBg (WebGL 2: Uniform Buffer Objects)

src/inferno/scene/scene.cpp

@@ -9,7 +9,7 @@
 #include <limits>  // std::numeric_limits
 #include <utility> // std::pair
 
-#include "entt/entity/entity.hpp" // ent::entity
+#include "entt/entity/fwd.hpp" // ent::entity
 #include "ruc/file.h"
 #include "ruc/format/log.h"
 #include "ruc/json/json.h"
@@ -25,6 +25,8 @@
 #include "inferno/component/tagcomponent.h"
 #include "inferno/component/textareacomponent.h"
 #include "inferno/component/transformcomponent.h"
+#include "inferno/render/renderer.h"
+#include "inferno/render/uniformbuffer.h"
 #include "inferno/scene/scene.h"
 #include "inferno/script/nativescript.h"
 #include "inferno/system/camerasystem.h"
@@ -84,7 +86,6 @@ void Scene::update(float deltaTime)
 void Scene::render()
 {
 	RenderSystem::the().render();
-	TextAreaSystem::the().render();
 }
 
 void Scene::destroy()

src/inferno/system/camerasystem.cpp

@@ -53,10 +53,23 @@ std::pair<glm::mat4, glm::mat4> CameraSystem::projectionView()
 	}
 
 	VERIFY_NOT_REACHED();
-
 	return {};
 }
 
+glm::vec3 CameraSystem::translate()
+{
+	auto view = m_registry->view<TransformComponent, CameraComponent>();
+
+	for (auto [entity, transform, camera] : view.each()) {
+		return transform.translate;
+	}
+
+	VERIFY_NOT_REACHED();
+	return {};
+}
+
+// -----------------------------------------
+
 void CameraSystem::updateOrthographic(TransformComponent& transform, CameraComponent& camera)
 {
 	// Update camera matrix

src/inferno/system/camerasystem.h

@@ -32,6 +32,7 @@ public:
 	 * @brief Return a pair from the camera component: { projection, view }
 	 */
 	std::pair<glm::mat4, glm::mat4> projectionView();
+	glm::vec3 translate();
 
 	void setRegistry(std::shared_ptr<entt::registry> registry) { m_registry = registry; };
 

src/inferno/system/rendersystem.cpp

@@ -4,50 +4,206 @@
  * SPDX-License-Identifier: MIT
  */
 
-#include "glm/ext/matrix_transform.hpp" // glm::translate, glm::rotate, glm::scale, glm::radians
-#include "inferno/component/model-component.h"
+#include <cstdint> // int32_t
+
+#include "glad/glad.h"
 #include "ruc/format/log.h"
 
 #include "inferno/component/cubemap-component.h"
 #include "inferno/component/model-component.h"
 #include "inferno/component/spritecomponent.h"
 #include "inferno/component/transformcomponent.h"
+#include "inferno/render/framebuffer.h"
+#include "inferno/render/render-command.h"
 #include "inferno/render/renderer.h"
+#include "inferno/render/shader-storage-buffer.h"
+#include "inferno/render/shader-structs.h"
+#include "inferno/render/uniformbuffer.h"
+#include "inferno/system/camerasystem.h"
 #include "inferno/system/rendersystem.h"
+#include "inferno/system/textareasystem.h"
 
 namespace Inferno {
 
 RenderSystem::RenderSystem(s)
 {
-	ruc::info("RenderSystem initialized");
 }
 
 RenderSystem::~RenderSystem()
 {
 }
 
+// -----------------------------------------
+
+void RenderSystem::initialize(uint32_t width, uint32_t height)
+{
+	m_framebuffer = Framebuffer::create({
+		.attachments = { Framebuffer::Type::Color, Framebuffer::Type::RGBA16F, Framebuffer::Type::RGBA16F, Framebuffer::Type::Depth },
+		.width = width,
+		.height = height,
+		.clearColor = { 0.0f, 0.0f, 0.0f, 0.0f },
+		.clearBit = GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT,
+	});
+
+	m_screenFramebuffer = Framebuffer::create({
+		.renderToScreen = true,
+		.clearColor = { 1.0f, 1.0f, 1.0f, 1.0f },
+		.clearBit = GL_COLOR_BUFFER_BIT,
+	});
+
+	Uniformbuffer::the().setLayout(
+		"Camera", 0,
+		{
+			{ BufferElementType::Mat4, "u_projectionView" },
+			{ BufferElementType::Vec3, "u_position" },
+		});
+	Uniformbuffer::the().create("Camera");
+
+	ShaderStorageBuffer::the().setLayout("DirectionalLights", 0, RendererPostProcess::the().shaderID());
+	ShaderStorageBuffer::the().create("DirectionalLights");
+
+	ruc::info("RenderSystem initialized");
+}
+
 void RenderSystem::render()
 {
-	auto quadView = m_registry->view<TransformComponent, SpriteComponent>();
+	static constexpr TransformComponent transformIdentity;
 
-	for (auto [entity, transform, sprite] : quadView.each()) {
-		Renderer2D::the().drawQuad(transform, sprite.color, sprite.texture);
+	// ---------------------------------
+	// Deferred rendering to a framebuffer
+
+	framebufferSetup(m_framebuffer);
+
+	renderGeometry();
+
+	framebufferTeardown(m_framebuffer);
+
+	// ---------------------------------
+	// Forward rendering to the screen
+
+	framebufferSetup(m_screenFramebuffer);
+
+	renderSkybox();
+
+	// Render 3D geometry post-processing
+	RendererPostProcess::the().drawQuad(transformIdentity, m_framebuffer->texture(0), m_framebuffer->texture(1), m_framebuffer->texture(2));
+	RendererPostProcess::the().endScene();
+
+	// Visual representation of light sources
+	Framebuffer::copyBuffer(m_framebuffer, m_screenFramebuffer, GL_DEPTH_BUFFER_BIT, GL_NEAREST);
+	renderLightCubes();
+
+	// Render 2D, UI
+	renderOverlay();
+
+	framebufferTeardown(m_screenFramebuffer);
 }
 
-	auto cubemapView = m_registry->view<TransformComponent, CubemapComponent>();
-
-	for (auto [entity, transform, cubemap] : cubemapView.each()) {
-		RendererCubemap::the().drawCubemap(transform, cubemap.color, cubemap.texture);
+void RenderSystem::resize(int32_t width, int32_t height)
+{
+	RenderCommand::setViewport(0, 0, width, height);
+	m_framebuffer->resize(width, height);
+	m_screenFramebuffer->resize(width, height);
 }
 
+// -----------------------------------------
+
+void RenderSystem::framebufferSetup(std::shared_ptr<Framebuffer> framebuffer)
+{
+	framebuffer->bind();
+
+	RenderCommand::setColorAttachmentCount(framebuffer->colorAttachmentCount());
+	RenderCommand::clearColor(framebuffer->clearColor());
+	RenderCommand::clearBit(framebuffer->clearBit());
+}
+
+void RenderSystem::framebufferTeardown(std::shared_ptr<Framebuffer> framebuffer)
+{
+	framebuffer->unbind();
+
+	RenderCommand::setColorAttachmentCount(1);
+}
+
+void RenderSystem::renderGeometry()
+{
+	auto [projection, view] = CameraSystem::the().projectionView();
+	auto translate = CameraSystem::the().translate();
+	Uniformbuffer::the().setValue("Camera", "u_projectionView", projection * view);
+	Uniformbuffer::the().setValue("Camera", "u_position", translate);
+
+	static DirectionalLightBlock directionalLights[2] = {
+		{
+			.direction = { -8.0f, -8.0f, -8.0f },
+			.ambient = { 0.1f, 0.1f, 0.1f },
+			.diffuse = { 1.0f, 1.0f, 1.0f },
+			.specular = { 1.0f, 1.0f, 1.0f },
+		},
+		{
+			.direction = { 8.0f, 8.0f, 8.0f },
+			.ambient = { 0.1f, 0.1f, 0.1f },
+			.diffuse = { 1.0f, 1.0f, 1.0f },
+			.specular = { 1.0f, 0.0f, 0.0f },
+		},
+	};
+	ShaderStorageBuffer::the().setValue("DirectionalLights", "u_directionalLight", directionalLights);
+
 	auto modelView = m_registry->view<TransformComponent, ModelComponent>();
 
 	for (auto [entity, transform, model] : modelView.each()) {
 		Renderer3D::the().drawModel(model.model->vertices(),
 		                            model.model->elements(),
 		                            transform,
+		                            model.color,
 		                            model.model->texture() ? model.model->texture() : model.texture);
 	}
+
+	Renderer3D::the().endScene();
+}
+
+void RenderSystem::renderSkybox()
+{
+	auto [projection, view] = CameraSystem::the().projectionView();
+	RendererCubemap::the().beginScene(projection, view); // camera, lights, environment
+
+	auto cubemapView = m_registry->view<TransformComponent, CubemapComponent>();
+
+	for (auto [entity, transform, cubemap] : cubemapView.each()) {
+		if (!cubemap.isLight) {
+			RendererCubemap::the().drawCubemap(transform, cubemap.color, cubemap.texture);
+		}
+	}
+
+	RendererCubemap::the().endScene();
+}
+
+void RenderSystem::renderLightCubes()
+{
+	auto [projection, view] = CameraSystem::the().projectionView();
+	RendererLightCube::the().beginScene(projection, view); // camera, lights, environment
+
+	auto cubemapView = m_registry->view<TransformComponent, CubemapComponent>();
+
+	for (auto [entity, transform, cubemap] : cubemapView.each()) {
+		if (cubemap.isLight) {
+			RendererLightCube::the().drawCubemap(transform, cubemap.color, nullptr);
+		}
+	}
+
+	RendererLightCube::the().endScene();
+}
+
+void RenderSystem::renderOverlay()
+{
+	auto quadView = m_registry->view<TransformComponent, SpriteComponent>();
+
+	for (auto [entity, transform, sprite] : quadView.each()) {
+		Renderer2D::the().drawQuad(transform, sprite.color, sprite.texture);
+	}
+
+	Renderer2D::the().endScene();
+
+	TextAreaSystem::the().render();
+	RendererFont::the().endScene();
 }
 
 } // namespace Inferno

src/inferno/system/rendersystem.h

@@ -6,25 +6,39 @@
 
 #pragma once
 
+#include <cstdint> // int32_t, uint32_t
 #include <memory>  //std::shared_ptr
 
-#include "entt/entity/registry.hpp" // entt::entity, entt::registry
+#include "entt/entity/fwd.hpp" // entt::registry
+
 #include "ruc/singleton.h"
 
-#include "inferno/render/renderer.h"
-
 namespace Inferno {
 
+class Framebuffer;
+
 class RenderSystem final : public ruc::Singleton<RenderSystem> {
 public:
 	RenderSystem(s);
 	virtual ~RenderSystem();
 
+	void initialize(uint32_t width, uint32_t height);
 	void render();
 
+	void resize(int32_t width, int32_t height);
+
 	void setRegistry(std::shared_ptr<entt::registry> registry) { m_registry = registry; };
 
 private:
+	void framebufferSetup(std::shared_ptr<Framebuffer> framebuffer);
+	void framebufferTeardown(std::shared_ptr<Framebuffer> framebuffer);
+	void renderGeometry();
+	void renderSkybox();
+	void renderLightCubes();
+	void renderOverlay();
+
+	std::shared_ptr<Framebuffer> m_framebuffer;
+	std::shared_ptr<Framebuffer> m_screenFramebuffer;
 	std::shared_ptr<entt::registry> m_registry;
 };
 

src/inferno/system/textareasystem.h

@@ -18,7 +18,7 @@
 namespace Inferno {
 
 using Symbols = std::vector<std::shared_ptr<Symbol>>;
-using SymbolQuad = std::array<SymbolVertex, Renderer<void>::vertexPerQuad>;
+using SymbolQuad = std::array<SymbolVertex, RendererFont::vertexPerQuad>;
 
 class Scene;
 class TextAreaComponent;

src/inferno/window.cpp

@@ -122,17 +122,17 @@ void Window::initialize()
 
 		switch (action) {
 		case GLFW_PRESS: {
-			KeyPressEvent event(key);
+			KeyPressEvent event(key, mods);
 			w.m_eventCallback(event);
 			break;
 		}
 		case GLFW_RELEASE: {
-			KeyReleaseEvent event(key);
+			KeyReleaseEvent event(key, mods);
 			w.m_eventCallback(event);
 			break;
 		}
 		case GLFW_REPEAT: {
-			KeyRepeatEvent event(key);
+			KeyRepeatEvent event(key, mods);
 			w.m_eventCallback(event);
 			break;
 		}

vendor/CMakeLists.txt

@@ -33,3 +33,4 @@ target_include_directories(${ENGINE}-dependencies PUBLIC
 	"glad/include"
 	"lua")
 target_link_libraries(${ENGINE}-dependencies glfw ruc ruc-test assimp)
+target_compile_options(${ENGINE}-dependencies PRIVATE ${COMPILE_FLAGS_DEPS})